Comments for What is the System File Checker, and how do I run it?

Comment from Praveen on 2010-02-13

2010-02-13T08:43:10Z

Task bar and Start menu were not to be found in Win Vista. I am trying your method I did not get a error or Message if it has fixed the prob. I will reboot if it is required
Thanks if it will work.

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Comment from Rita on 2010-02-01

2010-02-02T02:14:03Z

I used the SFC /scannow and nothing happened, it didn't even give any kind of error nor message. Does that mean there is nothing wrong with my files?

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Comment from Jackie on 2010-01-14

2010-01-14T11:34:09Z

Hi Leo. I have real problem in that I lost Outlook Express when I inadvertently restored factory settings. Now, when I want to send pictures prompted by windows live, Outlook express box comes up, I enter the recipient's address, press send, and then I get an error message .. lots of stuff followed by No, Server Error:998 Error Number Ox800CCC33. Can you advise please. Thanks
Jackie

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Comment from Don't Know What I'm talking about on 2009-12-11

2009-12-11T21:44:42Z

For all of you who get errors from trying to run from the disk, it is because the Windows CD is not updated to the proper version. Most likely, it is SP1, and you need to have an SP2 CD(or SP3, etc.). Google "slipstream Windows CD" and you'll probably find what you need. It tells you how to make your SP1 CD into a SP2.

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Comment from Ron on 2009-12-10

2009-12-10T13:11:54Z

Your Scannow fix worked great. The XP
Oe8 would not get to the email, giving
an "Oe has encountered problems, sorry"
useless message. Tried Sys Restore to
reboot but still not help. Tried the XP
Add/Delete Components without success.
The SFC did work. Thanks.

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Comment from Mozelle on 2009-12-05

2009-12-05T22:27:01Z

I am using what I think is Windows 2009. I moved from Texas to Louisiana and suddenely my midi file folder in outlook express has disappeared. It contains midis that I have collected for years to send out with my emails. Can you tell me how to and/or where to find it along with instuctions.
Thank you very much,
Mozelle

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Comment from jeff on 2009-12-03

2009-12-03T15:06:36Z

to the one with the error 17 message in grub... Error 17 usually means that grub cannot find it's menu.list file. Get a copy of the Ultimate Boot CD and it can restore grub automagically.

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Comment from Bill Hintz on 2009-12-02

2009-12-02T22:24:43Z

Hello Leo! Your newsletter is great! Now to the point. OS = Windows XP Home. I ran SFC /scannow and experienced the same as another poster - repeated msg asking for the CD. Took many retries. Window disappeared when bar reached the end. You state that is the way SFC act if it finds no errors.

My system still does not work properly. Cannot access my Inbox email (can't receive mail, but can send). Also, I cannot perform Restore actions. Msg keeps saying to pick a different date. This tells me that files are either corrupted or missing.

Any ideas?

Bill

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Comment from mendo on 2009-12-01

2009-12-01T18:55:11Z

i just ran system file checker on a ubuntu/winxp system and upon reboot, am receiving error 17 from GRUB. i would never have run this utility if i had known it could interfere with my setup. you should have mentioned the possible danger to dual boot machines. do you have any advice on fixing this?

Sorry, no. I think it's highly unlikely that SFC did this. It just checks windows files and shouldn't be poking around outside the Windows partition when it's running.

02-Dec-2009

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Comment from kim on 2009-11-26

2009-11-26T17:21:26Z

I have windows automatic updates and when my computer restarted after update for clock..I have no start button or taskbar and I ran sfc/scannow..I added explorer via task manager..nothing happened..I don't have a windows cd because I have an hp that has system restore but now I can't find it..please help..thx

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Comment from Caleb on 2009-11-01

2009-11-02T00:48:31Z

I don't have the servise pack 3 cd I downloded it from windows update. I have servise pack two what do I do Leo?

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Comment from James Koontz on 2009-10-25

2009-10-25T11:52:00Z

Ran SFC /scannow. Used original setup disk. Got a message that I needed setup disk 2. Hence this action did not solve my problem. I am going to the microsoft blog via an alternative browser. I remember seeing a wordperfect version of a fix to the problem.

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Comment from Aaron Minidis on 2009-10-16

2009-10-17T04:29:41Z

Hi Leo! I have had a problem with two computers in my home that I am sure is related to one of the sites I visit. As I only access approximately 10-15 total sites and am the only user, a virus seems the only possibility. 98% of the time, when I power up my monitor times out like it is recieving no video input. I have run "sfc /scannow", but there have been no errors found. Since it has happened with both systems, I am sure I have a virus, but have no practical knowledge of what virus/virus(s) I may have, I have no idea how to proceed. Any suggestions?

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Comment from Brian Kochera on 2009-09-22

2009-09-22T23:59:08Z

I have only the original XP Home ED. CD. It is useless to run "SFC /scannow" because if I try & use it my system always says I have the wrong CD inserted.

So what is my option when I have upgraded to SP3, then installed multiple updates? I don't want to run a repair install. I tried this once before with another problem. It installed original files which clashed with the Windows Updates. My OS was totally hosed.

I want to obtain or reinstall the Search helper files which have suddenly gone missing. How do I get up to date ones ( or ones that are compatible with all the Win Updates?) using SFC?

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Comment from Vaerio Ferreira on 2009-09-18

2009-09-18T15:13:30Z

Leo,
when running SFC \scannow, with the right XP SP3 CD in the CD-ROM drive, a window appears repeatly saying" Files that are required for windows to run properly must be copied tp the DLL Cache. Retry, More Information, Cancel". Answering "Retry" makes drive light to twickle and the progress bar to go up a little until this window strikes again.
"More Information" reports the following:"Possible reasons for this problem: 1.You may have inserted the wrong CD. (i.e., a different windows product CD than the version installed. 2. The CD-ROM drive in your system is nor functioning".
I confirmed that the CD is the right one and is updated to SP3 such as the version installed in the PC.
After hundreds of retries the process ends up apparently well i.e. without further infornation. Can you realize what's up?

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Comment from matt on 2009-09-17

2009-09-18T06:11:43Z

i have vista and i'm pretty sure i have a virus i can't get rid of. i keep trying to open up SFC but it suddenly appears and disappears. what does that mean/what should i do?

Have a look at this article: When I use Start-Run and type in a command, why does a window just flash and disappear?

18-Sep-2009

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Comment from Richard Fuller on 2009-08-01

2009-08-01T12:24:47Z

I ran SFC /scannow. Window pops up saying - Please wait while Windows verifies that all files are intact and in their original version. When that got done, window went away. I didn't see anything happen after that, so I tried running SFC 'scannow again, and same window came on saying the same thing. What and how do you scan?

You just did. If SFC finds no errors that's how it behaves.

01-Aug-2009

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Comment from CD on 2009-06-13

2009-06-13T17:12:26Z

I have Windows XP. I do not have the file
SFC/scannow. Please explain.

There's should be a space between SFC and /scannow

- Leo
14-Jun-2009

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Comment from Diane on 2009-05-30

2009-05-30T21:13:43Z

I am having problems controling iexplorer.exe How do i keep it from Crashing my computer. I'd like free safe download, I have Windows XP home Edition

Thank-you

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Comment from Mike Passaretti on 2009-04-07

2009-04-08T02:28:19Z

Leo, I installed IE 8 on my XP mach. Didn't work. Removed it and IE 7 wouldn't work. Removed it IE 6 worked. Reinstalled IE7 and all fixes & SP3. Works fine. Outlook Express now has a prob. Cannot open any links from outlook. Ran SFC /scannow. Ran to completion no problems. OE still not working for links. Any ideas?

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Comment from Steve on 2009-03-09

2009-03-09T18:02:50Z

I Secode Peter Owens Comment from March 1ST 2009. Please address this issue Leo.

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Comment from Peter Owens on 2009-03-01

2009-03-02T02:46:08Z

Leo,
I have only the original XP Pro CD.
Usually this is useless because if I try & use it my system always says "the installed version is more recent".
So for just about EVERYBODY, who has the nearly 100 XP updates, including SP2 & 3, surely the advice you offer, to try & use the original CD is useless.
This is the second comment on this topic which I hope you see fit to address.

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Comment from cal on 2009-02-28

2009-02-28T22:46:25Z

i cannot send e-mails it constantly asks for identification via distorted letters numbers etc even though i correctly identify them

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Comment from Erin Lounsbury on 2009-02-27

2009-02-28T00:08:52Z

I just found this site and so I'm new to finding information here. I was wondering if Mike Creel's question posted on 1/28/08 has been answered and if so it would be great to read it. His question applies to me as well.

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Comment from dhoo on 2009-02-22

2009-02-23T02:18:33Z

...hey, mr. leo... i dunno if this is a virus or what, my laptop got an autorun thing... and i can't delete it, i have an anti virus here but that autorun thing keeps invading my file, even my usb and cp were infected... what should i do>?

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Comment from Noah on 2009-01-26

2009-01-27T00:07:42Z

Hi Leo,
I recently had a nasty Trojan called Prunnet.exe.
I used various programs to attempt to remove it, which i think has been done successfully.
Anyway, after running the anti-virus/anti-malware programs, I've been getting error messages, and once my computer shutdown because some vital system processes were not running.
I think that the anti-virus programs may have deleted some system files, so i ran system file checker.
After the scan, the scan completed (to my knowledge), but the small "windows file protection" window disappeared.
Does this mean that all the system files are intact and undamaged?
I anxiously await your reply.

Unfortunately there's no way to know. This article discusses: My anti-virus performed a virus removal but I still have a symptom, how do I get rid of it?

- Leo
27-Jan-2009

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Comment from RB on 2008-12-11

2008-12-11T13:18:53Z

I am responding to my own post. I did more searching and found that the files that SFC wasn't able to find and asked for CD2 don't exist for Windows XP Media Center 2005. Here is a Microsoft article that says what should be done. http://support.microsoft.com/kb/909059

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Comment from RB on 2008-12-10

2008-12-11T02:49:28Z

I have my Windows XP Professional on a DVD. The SFC runs close to the end and then asks for Windows XP Professional CD2. I don't have a second CD since it is on a DVD. I click Retry and it doesn't accept the CD. How do I get around this?

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Comment from Mike Creel on 2008-10-28

2008-10-28T22:38:49Z

I just successfully ran System File Checker on my custom built PC using my Windows XP Home Edition master disk. Interestingly, the disk would not run in my CD drive, but ran perfectly in my combination Benq DVD writing drive. After the System File Checker ran, I saw no error messages. I have been trying to solve a problem, trying to determine why my front USB ports have stopped recognizing my Digital Concepts card reader/writer.

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Comment from Duane Foster on 2008-10-18

2008-10-18T18:08:15Z

When running system file checker use:sfc /scannow.
Be sure you leave a space between the c and slash.
As sfc /scannow.

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Comment from Ray Brumbaugh on 2008-09-23

2008-09-23T18:54:49Z

Is there a potential problem when using SFC and you have updated your system with various service packs. It seems like some of those critical system files would have changed, and there you are putting in your ORIGINAL install disk with "old" system files on it.

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Comment from Greg Fiore on 2008-09-10

2008-09-11T02:12:52Z

Leo,
All of a sudden an XP PRO computer boots, but
stops with the error message that the windows\system32\config\system file is either missing or corrupted. The file exists and is about 5 meg, so it must be corrupted.
I read your article about using sfc /scannow,
however when I use the original OS CD to boot and get to a command prompt with the "r" recovery option, the sfc.exe is not an available file to run.
Is it on the OS CD?
If not then trying to fix a damaged system file
that is keeping the OS from loading using the sfc
command is useless. No START RUN available !!
What am I missing? If it can't be run from the Recovery Console, then you should tell your readers that for 95% of the time they can not fix a computer that is stuck because of a corrupted file.
Greg Fiore

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Comment from CAL on 2008-08-26

2008-08-26T16:47:15Z

Hey leo I had to get rid of antivirus xp2008 and i dunno if i corrputed some things in the process
Now add or remove programmes will not work:(
Nothing happens at all when i click it
I tried sfc but when i pressed enter it flashed up for a brief moment and then dissapeared
Any help:s

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Comment from Ren on 2008-07-30

2008-07-30T18:18:37Z

NTLDR missing or boot.ini has been changed:

Use Window XP CD-ROM, run the Recovery Console
and run the Bootcfg/rebuild.

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Comment from Leo on 2008-06-03

2008-06-03T17:25:30Z

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I'm not totally sure I understand your question, but:

- you can run SFC /SCANNOW from the Start->Run menu item

- you can run SFC /SCANNOW from within a command prompt

You might try safemode, and you might try the recovery
console as well, if things aren't working for you.

ALSO, I'm not 100% convinced that SFC will restore NTLDR. I
could be wrong.

Leo

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Comment from Marty Pawlukanis on 2008-06-03

2008-06-03T12:18:13Z

Okay, I have been trying to use SFC for a while now, one time successfully. My question is : Can you run SFC without getting to the "Run" command? I have a problem with a PC not booting, giving me the "Missing NTLDR" error message and I want to use SFC to replace the missing NTLDR files and boot normally again. I notice that you can't really run SFC from a command line prompt, or if you can, I am doing it wrong. Any help would be great, thanks.....Marty

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Comment from Leo on 2008-05-27

2008-05-27T17:09:41Z

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There should be a space between SFC and /scannow

Leo

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Comment from Ben on 2008-05-26

2008-05-27T05:33:26Z

I tried to run SFC/scannow but was given an error in return saying Windows could not find...I have been trying to get my task bar/start menu and other options back up that disappeared after a disc scan...

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Comment from Tim on 2008-04-07

2008-04-07T19:58:14Z

If you run the system file checker (sfc /scannow) and you get: "windows resource protection could not perform the requested
operation" try this:

-Reboot your PC, and after the BIOS screen keep pressing F8 to get to the advanced boot menu.

-Choose Repair your computer

-Login as Administrator or the equivalent

-Open the command prompt, and type CHKDSK C: /F /R

This will scan your hard drive for errors in the FAT (File Allocation Table). It will perform a physical scan of your hard drive and attempt to repair any errors it finds. The logic behind this step is that the SFC /SCANNOW won't run properly b/c it cannot actually access the files on the hard drive.

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Comment from Leo A. Notenboom on 2008-01-11

2008-01-11T17:39:54Z

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I'd point you at this article:
http://ask-leo.com/iexploreexe_has_generated_an_error_now_what.html

And sending error reports will not solve the problem
quickly:
http://ask-leo.com/should_i_send_error_reports_to_microsoft.html

Thanks,

Leo

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Comment from Ricardo Rambally on 2008-01-10

2008-01-10T21:31:50Z

I keep getting the same error report " IE has encountered an error and needs to close..."
Then, my windows explorer is giving me a really hard time. It now does not work. So, I cannot access the " My Computer " Folder. What do i Do? does the SFC thig resolve these issues?
Help!

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Comment from Leo A. Notenboom on 2007-12-06

2007-12-06T23:48:18Z

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I believe this article will help, it details what to change to tell Windows and
SFC where to find the CD image:
http://ask-leo.com/how_do_i_tell_windows_where_my_i386_folder_has_moved.html

Leo

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Comment from Marlene on 2007-12-05

2007-12-05T15:15:11Z

As several others above, I ran SFC, confident that I would be able to point to the proper directory when asked to insert my Windows CD. I was not given this option -- only 'retry; more info and cancel'. When 'cancel' was selected, I was not given an option to browse for the correct directory'. I tried burning a CD populated with the I386 directory, but this didn't work either! Any suggestions? Thanks, Marlene

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Comment from Leo A. Notenboom on 2007-10-29

2007-10-29T16:27:27Z

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SFC is still the answer. What does "unable to" mean?

Leo

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xt/2RnjlScyJ47stwRvOYLY=
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Comment from Dianne Belford on 2007-10-26

2007-10-27T01:01:21Z

I tried running the sfc and was unable to. This is the error message I have received when opeing OE. Nothing I do seems to fix this.

This program has performed an illegal operation and will be shut down.
MSIMN caused an invalid page fault in
module SHLWAPI.DLL at 016f:70bd899f.
Registers:
EAX=00000006 CS=016f EIP=70bd899f EFLGS=00010206
EBX=00000000 SS=0177 ESP=0056d04c EBP=0056d058
ECX=0056ce44 DS=0177 ESI=00000000 FS=425f
EDX=0056ce44 ES=0177 EDI=5ec041b8 GS=0000
Bytes at CS:EIP:
8a 03 84 c0 74 52 8a c8 f7 d1 f6 c1 80 0f 84 ea
Stack dump:
00000003 00000000 00000000 0056d1b8 5ec237b7 00000000 5ec041b8 00000006 00000016 00000000 00000000 0056d0b8 00000010 819b0228 00000024 bff7a3a0

Hope you can help.

Regards
Dianne

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Comment from Leo A. Notenboom on 2007-10-15

2007-10-15T22:13:22Z

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Assuming you mean Chkdsk, not "check", it sounds like a bad sector on the disk,
offhand. I'd probably have you follow the recommendations in this article:
http://ask-leo.com/chkdsk_runs_on_every_boot_but_fails_and_my_system_is_unstable_what_can_i_do.html
(even though it's about a slightly different scenario, these are the steps I'd
have you do.)

Leo

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Comment from DENIS on 2007-10-13

2007-10-13T17:41:37Z

I am having a problem with my check. First when i secdule a task(the one that requires you to restart your comp) it stops at 2 percent and never continues.) however, when i do the one that doesnt require you to do that its works perfectly fine. IT did mention something about Found folder. Any suggestions?

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Comment from Leo A. Notenboom on 2007-08-17

2007-08-17T20:31:37Z

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Make sure there's a space between "sfc" and "/scannow"

Leo

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Comment from Lou Granata on 2007-08-16

2007-08-17T01:48:45Z

I tried at least ten times to enter sfc/scannow & sfc\scannow in the command line and it cannot be found. I guess that won't work for me......What will???

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Comment from Kris on 2007-06-09

2007-06-09T08:41:34Z

Thanks for the tip w/ sfc. Another bit of info to add to this would be how to pull it up if the start bar is missing. I found by going into the command prompt and typing sfc/runnow i was able to scan withouth goingting through the 'run' option.

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Comment from Marjorie on 2007-02-26

2007-02-26T17:51:44Z

I get the message "missing dll" when starting up. I am going to try this to see if I can correct this problem. Also, today, I have had the BSOD (blue screen of death) twice. Am considering purchasing SpinRite. Hope I am computer savy enough to run it without making things worse. Thanks for your advice.

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Comment from Igor on 2006-12-30

2006-12-31T06:06:42Z

I had the same problem, i.e., SFC not running as it should have. In XP SP2 (and all XP should have SP2) there is a repair and maintain instruction on Microsoft info pages. Look for it under Windows Repairs. Run it according to their instructions. You will need your Windows disc and patience. Run that, then cut and paste Leo's coding for SFC in the Run box. Works like a charm.

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Comment from cynic on 2006-12-20

2006-12-20T23:11:39Z

For those who are having the "RPC server is unavailable" problem with sfc, the following registry edit / path variable fix may help. This is designed to fix the windows help and support center if this has stopped working, but in my case, also solved the sfc issue.

> > At a command prompt, type SET
> > If the value for WINDIR=%systemroot% (and if you have all the above
> > mentioned problems, it WILL be :-) ) you need to apply the following
> > fix:
> >
> > Run REGEDIT
> >
> > Go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session
> > Manager \Environment
> >
> > in the right-hand pane, find the value WINDIR. You'll notice it is of
> > type REG_SZ. This is incorrect since it's value (%systemroot%) needs to
> > be expanded to what windows will eventually use (in my case,
> > C:\WINDOWS).
> >
> > What is happening is window is attempting to load the help and support
> > module (and anything else that relies on the %windir% environment
> > variable) by calling it %systemroot%\pathtofile\file.dll instead of
> > c:\windows\pathtofile\file.dll.
> >
> > DELETE the existing windir value.
> > Make a new EXPANDABLE STRING VALUE, call it WINDIR and give it the
value
> > %systemroot%
> >
> > This procedure basically recreates the WINDIR value as an expandable
> > string.
> >
> > Reboot your system and watch your help and support center work for the
> > first time in recent memory.

Hope this helps

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Comment from Leo Notenboom on 2006-12-09

2006-12-09T16:39:42Z

Try this article: http://ask-leo.com/when_i_use_startrun_and_type_in_a_command_why_does_a_window_just_flash_and_disappear.html

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Comment from Barbara on 2006-12-09

2006-12-09T15:21:22Z

Nothing happens when I type in SFC. A blackbox comes up and dissapears quickly. What can I do?

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Comment from Leo Notenboom on 2006-11-02

2006-11-03T04:54:39Z

It's SFC (not STC) and there's a space between SFC and /scannow.

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Comment from George on 2006-11-02

2006-11-03T03:48:27Z

When I try to run the System File Checker as outlined above, I get an error message stating that Windows cannot findSTC/scannow. What do I dO?

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Comment from Leo Notenboom on 2006-10-30

2006-10-30T17:06:25Z

I think I need you to be more specific about the error message. What can't be found? SFC? How are you running it?

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Comment from Marta Celenia on 2006-10-29

2006-10-30T06:42:01Z

When trying to run system file checker i get an error message that states it cannot be found. help!!! what can I do??

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Comment from Lane on 2006-09-18

2006-09-18T15:49:08Z

Leo,
While your site was a help it didn't fix my problem. Everything refers to the installation of Win Inst 3.1 but no one every mentioned going into Control Panel, Adm. Tools, Dbl Clicking Services, going down to Windows Installer, make sure it's in manuel and then in the upper left corner of you screen click on Start. Now it works.

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Comment from Leo A. Notenboom on 2006-08-21

2006-08-21T17:03:34Z

You want this article: http://ask-leo.com/when_i_use_startrun_and_type_in_a_command_why_does_a_window_just_flash_and_disappear.html

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Comment from Carol on 2006-08-21

2006-08-21T16:40:48Z

Hello,
Thank you for all the advise you give it's so helpful and welcomed. I tried to do 'press Start, Run, and then type in SFC', and I could see the black DOS box flicker on and then back off so fast it would make your head spin. I tried once more after 10 mins. and it was the same. Any suggestions please?

Thank you,
Carol

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Comment from Adnan Ali on 2006-06-06

2006-06-06T14:05:32Z

Help, my Folder Options in the Tools menu of Windows Explorer has disappeared.

I am using WinXP. This has occurred before and I got the remedy from Comp Active mag but I seem to have lost it.

Can anyone please help me to restore this option. I remember it was quite simple really!!

Thanks

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Comment from Leo on 2006-05-14

2006-05-14T16:11:13Z

The System File Checker only checks files that are part of Windows. Other programs are not checked.

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Comment from Nyxteridas on 2006-05-13

2006-05-13T20:43:12Z

Will this have affect to the Windows File System ONLY? I mean, will it maybe be important to reinstall some of my programs?

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Comment from Leo on 2006-05-13

2006-05-13T16:18:17Z

Open up a separate command prompt window, and then type the SFC command in there.

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Comment from Nyxteridas on 2006-05-13

2006-05-13T16:03:27Z

Ok, i run sfc, but the Command Prompt window appears and immediately disappears... What now? Is there any tool in the web for checking the File System???

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Comment from Bill D. on 2006-03-14

2006-03-14T20:44:19Z

Yep, I found scannow kept stopping and asking for the cd but clicking 'retry' each time and the scan progressed. After many stops (maybe 10+ mins)the scanbar reached 100% and that was it...no ok message . Assume no problems found ?!

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Comment from Leo on 2006-02-02

2006-02-03T00:25:49Z

Yep. See this article: http://ask-leo.com/iexploreexe_has_generated_an_error_now_what.html

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Comment from stewart on 2006-02-02

2006-02-03T00:19:08Z

What if the apps error does not cause a system crash, just a simple click ok,and it's gone would you still run the SFC? IEXPLORE.EXE Application Error
The instruction at "0x1001cbf1" referenced at "0x1001cbf1". The memory could not be "read". Click on ok to terminate the program. That's the apps error i got twice in two days. what should I do about it. XP Home SP2 IE 6

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Comment from Leo on 2006-01-20

2006-01-21T06:35:07Z

There's no report that I'm aware of. Basically if it finds an error, it'll let you know. Otherwise no news is good news. :-)

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Comment from Dan on 2006-01-20

2006-01-21T06:30:03Z

I ran SFC/scannow & expected a report when it was done - but none was produced. If a report was created, where should I look for it?

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Comment from Remi on 2005-12-22

2005-12-23T00:01:11Z

What is the System File Checker, and how do I run it?
Well Leo explained very well. It is pretty simple and obvious to me.

Here is another way to help you:
Click the Start Icon / Run / Type: “SFC /scannow” without the quote.
Or copy paste
There you go…

Be patient it takes a while. Than restart Windows…

Monk

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Comment from Leo on 2005-12-15

2005-12-16T04:21:51Z

You need to run a command prompt (start, run and then type "cmd" and OK), and then run the sfc /scannow in the resulting command window.

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Comment from luke on 2005-12-02

2005-12-03T00:19:58Z

Hi Leo, when I try to run system file checker a black screen comes up then instantly goes away. Please help.

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Comment from Leo on 2005-10-07

2005-10-07T16:27:09Z

You want this article: http://ask-leo.com/how_do_i_resolve_my_msn_hotmail_sign_in_problems.html

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Comment from jodie on 2005-10-07

2005-10-07T08:36:41Z

dont know bout anyone else but i cannot even access my hotmail account, it just comes up with page cannot be displayed and i've heard about other ppl who have the same problem..anyone know wats goin on

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Comment from Leo on 2005-10-01

2005-10-01T22:57:32Z

You want this article: http://ask-leo.com/how_do_i_resolve_my_msn_hotmail_sign_in_problems.html

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Comment from christina on 2005-09-30

2005-09-30T21:48:34Z

Dear Leo,
I have 2 hotmail adresses, one i can access fine (christinabitar@hotmail.com) and one i can only reach the inbox page and that's it (kooky555@hotmail.com). in the inbox, i can see all the new emails but i cannot click on any of them! a yellow error icon appears on the left botttom of my screen. what could be the problem? i have tried all the soluctions mentioned above!!!
please help!
christina

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Comment from Leo on 2005-09-23

2005-09-23T21:10:40Z

You want this article: http://ask-leo.com/how_do_i_resolve_my_msn_hotmail_sign_in_problems.html

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Comment from Elijah Hamilton on 2005-09-23

2005-09-23T18:01:12Z

every time i try to log into my hotmail account I get the message "page can't be displayed" or cannot find server. I need to check my email, it lets me put the email address in but it doesn't load up the page. I need to get this resolved quickly as possible because I have important information I need to attend to. Thank you.

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Comment from Leo on 2005-09-19

2005-09-19T23:36:32Z

Your POP3 server is part of the configuration for yoru email account. What server name to use should have been provided to you by your ISP.

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Comment from Zen on 2005-09-19

2005-09-19T23:35:33Z

I have Outlook Express but I can't send or receive any email. It always said the host POP3 couldnot be found. what is this and how can i corect it?

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Comment from Leo on 2005-09-08

2005-09-08T15:55:36Z

It should work either way ... but whatever works :-).

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Comment from Carina on 2005-09-08

2005-09-08T08:21:13Z

it dit not work wth SFC in CAPS I had to type it lowercase for it to work
(incase anyone else has troubles

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Comment from Leo on 2005-09-01

2005-09-02T05:05:10Z

gruebane: it should restore the updated software from an additional copy it installs on your hard drive when you installed the SP or patch.

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Comment from gruebane on 2005-08-30

2005-08-31T00:35:18Z

What does this SFC do if a file was updated through a security update, or a service patch? will this restore the older file ??

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Comment from Brendan Townsend on 2005-08-18

2005-08-18T22:42:16Z

Hi Deborah.

I'm not an expert on XP problems - just very familiar as I often push my PC's to the limit.

Anyway, I believe that you are not entering the full command line. If you just type SFC and then attempt to run it, nothing will happen as you haven't stated any program options.

What you need to do (in the above suggestion) is actually type the following in FULL in the run box, precisely as below...

sfc /scannow

...and then hit the OK button.

Best regards,
Brendan.

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Comment from Leo on 2005-07-15

2005-07-15T17:18:00Z

Heh ... sorry.

In most cases you'd click Start, All Programs, Accessories, and then Command Prompt.

Or, click Start, Run and then type in "CMD" and hit OK.

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Comment from jeff on 2005-07-15

2005-07-15T11:49:23Z

what do you mean "fire up a command'?

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Comment from Leo on 2005-05-18

2005-05-19T05:06:41Z

It probably tried to display an error message. Instead of using Start-Run, fire up a command prompt and enter the sfc command in it. That way if there's an error message, you'll see it and can correct whatever as needed.

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Comment from deane on 2005-05-18

2005-05-18T21:58:15Z

I tried to run the sfc and a window tried to com up but then it went away.Do you have any suggestions? deane

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Comment from Leo on 2005-04-22

2005-04-22T16:14:45Z

Reboot. If it only boots into safe mode, there's an error message somewhere along the way that tells you why. Correcting that error should resolve the issue.

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Comment from randy on 2005-04-22

2005-04-22T15:25:29Z

how are ya? My windows ME is in the safe mode. How do i get it out of safe mode to normal mode?

Randy

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Comment from Leo on 2004-11-30

2004-11-30T23:37:55Z

Are you sure your power supply can handle both voltages properly? At any rate, it does sound like a power supply problem, and I'd probably start by replacing that.

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Comment from Stew on 2004-11-30

2004-11-30T23:30:15Z

I'm not to sure where to ask you...but...My computer is having a major problem...it seems to me to be the power...when turned on under 115v only the fan runs and the computer won't even turn on...and on the rare occasion it does it freezes after about 2 minutes....under 250v it will run but only for so long before it shuts off completely...I've restored my hard drive a number of times. Could it still be a virus...or something else?

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Leah on 2004-10-21

2004-10-22T03:02:32Z

Thanks for you comment. I tryed again. Hoping that maybe I just missed it. I still didn't see if, so i decide to take screen caps to see if I was being a ditz or if my program isn't working right.
Here is the url for the image of the frist box:
http://img.photobucket.com/albums/v241/yourhtml/box1.jpg
and this is the second box:
http://img.photobucket.com/albums/v241/yourhtml/box2.jpg

is this what i should be seeing?

Again, I want to say thank you for being such a great guy about this.

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Comment from Leo on 2004-10-21

2004-10-22T00:07:25Z

Leah: That second request for the CD should have included a BROWSE button that you should be able to use to locate the files requested.

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Leo on 2004-10-21

2004-10-21T17:16:03Z

There should be a space between sfc and /scannow

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A comment on: What is the System File Checker, and how do I run it?

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Comment from janet on 2004-10-21

2004-10-21T17:04:08Z

I wanted to run SFC to check out a problem. Went to Run, typed in sfc/scannow and window box came back saying it cannot find sfc/scannow. Make sure I've typed correctly, etc. what has happened to that file? I recently installed, then uninstalled SP2, because I had all kinds of problems. Would that have anything to do with it?

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Leah on 2004-10-21

2004-10-21T08:49:07Z

1st - great site
2nd - I'm having trouble with this. I'm missing note pad. so i followed your advice here. I read the article on what to do if don't have a start up disk and then went about running the SFC. It found a problem and asked for the cd, it offerd the options to "Retry" "More Info" and "Cancel" I hit retry and it aked for the cd again( in a new box). I hit "Ok" and was hoping that it would ask for me to locate it, it didn't how ever. My question is, did i do something wrong, or is they some other way to do this? Your help would be awsome if you have the time. I really miss my notepad. I've tried to include as much information as possible. And will provide more if asked. I'm not all that computer savy, so take it easy on me if this is a stupid question. :)
Thank You in advance.

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Leo on 2004-10-08

2004-10-09T01:40:41Z

This article would be the place to start: http://ask-leo.com/iexploreexe_has_generated_an_error_now_what.html

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Comment from DANIELLE on 2004-10-06

2004-10-06T18:32:25Z

I AM WORKING ON WINDOWS XP AND WHEN I TRY TO OPEN SOME WEBSITES ON MSN OR EARTHLINK (EX. OLDNAVY.COM) IT OPENS IT AND THEN SOMETHING POPS UP THAT SAYS IEXPLORE-APPLICATION ERROR
THE INSTRUCTION AT "0x7c9105f8" referenced memory at "0x01b60010". THE MEMORY COULD NOT BE "READ".
CLICK ON OK TO TERMINATE THE PROGRAM.
PLEASE PLEASE HELP ME

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Comment from Leo on 2004-09-03

2004-09-03T21:45:51Z

You might need to repair Windows by doing an upgrade/repair install: http://ask-leo.com/d-40903a is a MS KB article "How to perform an in-place upgrade (reinstallation) of Windows XP"

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Comment from Avinash on 2004-09-03

2004-09-03T20:29:24Z

When I type SFC /SCANNOW or SFC /SCANONCE, it shows me the following messages
-------------------------------------
C:\>sfc /scanonce
Windows File Protection could not make the requested change.

The specific error code is 0x000006ba [The RPC server is unavailable.
].
-------------------------------------

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Leo on 2004-08-28

2004-08-28T16:24:46Z

As the article you just commented on specifies:

sfc /scannow

should do the trick. If you're having trouble, may be easier if you open a command prompt and do it in there, rather than the start-run box.

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Dave on 2004-08-28

2004-08-28T11:46:14Z

I have a simple problem - I type Sfc.exe in the run box and it "pops up" for a split second - then disappears!! Have tried many times. I am not a computer expert - so I'm not exactly sure EXACTLY what to type at the command prompt (the 2nd route I've tried). Microsoft website isn't much help.

Thanks

Dave

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Leo on 2004-05-30

2004-05-31T03:50:44Z

Great resource Ed, thank you. In fact it might well solve a problem I experienced over the weekend :-). (FYI - I changed the link to go through my redirector.)

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A comment on: What is the System File Checker, and how do I run it?

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Comment from Ed on 2004-05-30

2004-05-30T22:20:57Z

http://ask-leo.com/d-scannow

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A comment on: What is the System File Checker, and how do I run it?

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