Comments for How do I find the Windows CD Key from the CD?

Comment from Dan78 on 2012-01-07

2012-01-07T20:55:59Z

I dont understand, the product key in the 'unattend.txt' file is the same on all the discs i've looked at.. but if the key is not on the cd, then when you enter the key during set up how does the system know if its correct or not !?!?

Math. Complicated math. As an over-simplification, let's say you have a 5 digit product key. The "math" is that all combinations that add up to 13 work. So all Windows has to know is "13", and the "rule" that the digits add up. Liek I said, the actual rules and math are complex and border onto cryptography, but hopefully you get the idea.

07-Jan-2012

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Comment from Liam on 2011-12-13

2011-12-13T19:04:43Z

It was fantastic! ... i used a key on my computer and it worked. Both methods should work but my key worked too.!

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Comment from barry on 2011-07-22

2011-07-22T17:59:40Z

i have and old hp paillion a1243w moldel and lost the cd , with home edition on it i tryed getting one from hp no luck don't have them any more. So made recovery disk from my buddy but can only load to were you enter keys please Help Ty Barry

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Comment from JustCurious on 2011-07-11

2011-07-12T04:48:08Z

Dear J Davis and Leo:

I used to slap PCs together and install the software. Just for fun, of course.

Ever since I found out about the file where the KEY is supposedly stored, and Curious as I am, I checked this unattend file on every WinXP CD that passed my hands.

Well now! Guess what? Appears you are both correct.

In every case this file contained a CD Key, but in using it to install WinXP, not in every case this key was valid.

Does it make sense? Who knows, or better yet ... who cares?

But, don't take my word for it. Find out for yourselves.

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Comment from J Davis on 2011-07-11

2011-07-11T20:03:00Z

I think that you should know, your article is totaly incorrect ! ALL MICROSOFT DISK HAVE THE KEY ON THEM, in fact the way that they at produced there are any were from 25 to 100 keys. some times it is as easy as looking in the config file as the other post said, but in most cases you will need a working computer and a program like"DriveSpy" to search for the key. This is a very time consuming thing to do!

This information I know to be true! With 35+ years as an IT Pro/System Administrtor I hve worked withevery OS from Microsoft, from MSDos to OS 2 to Server 2008 Data Center.

So please in the future if you do not know the answer for people then do not post something that is wrong!

Needless to say it's I who believe you are wrong. This has been hashed and rehashed in prior comments.

14-Jul-2011

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Comment from kevin breakfield on 2010-10-21

2010-10-22T05:01:39Z

i actually found the product key on my windows xp cd,inside the config files,just go to another computer and open the cd and then go to a file called i368 and in there u will find a config or setup config file and this will open up an internet window which will show the product key.

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Comment from VICTOR on 2010-07-26

2010-07-27T06:16:06Z

the key is on the cd, i have been a computer tech for over 9 years, sometimes the key will not activate windows in that case you will need to change your windows key to the key on the coa sticker that you should have on your computer, then you can activate, if the key wasnt on the cd then you would not be able to install but like i said you might have to change it, the windows key should match the coa sticker

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Comment from Johnny on 2010-07-18

2010-07-18T13:58:21Z

I have the original MS XP Service Pack 1 CD.
I tried UNATTEND.TXT and the product key given there didn't work.
I couldn't find WINNT.sif

Which is exactly why I've been saying that the product key is not on the disc. You need to get it from the box it was in, or the machine it was originally installed on.

18-Jul-2010

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Comment from marco on 2010-07-09

2010-07-09T16:00:42Z

If the key is not on the CD, why the XP key printed on the label of my PC (crashed) is invalid when I try to reinstall the o.s. using a win xp installation disk?.
Moreover, I don't think that Microsoft can check the validity and unicity of the key during installation, since the o.s. can be installed without any internet connection active.

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Comment from Adam on 2010-06-30

2010-06-30T11:31:17Z

Just referring to PrivateWalker comments, I thank you for the comment, I have been looking everywhere for this information well done

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Comment from Boyd6944 on 2010-06-23

2010-06-23T14:52:13Z

PrivateWalker is absolutly correct, I checked both places. UNATTEND and the WINNT.sif file, the Product Keys are completely different.

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Comment from PrivateWalker on 2010-06-07

2010-06-07T12:57:47Z

Leo, re: your comment on 5th June 2010 about finding the product key on the XP Home Edition disk.
You are describing a totally different file on the disk! Yes, I am well aware that there is a dummy key in the I386,UNATTEND file, to which you refer.
I maintain, for anyone reading this, that the key in I386,WINNT.SIF file, (a totally different place on the disk), is good.

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Comment from PrivateWalker on 2010-06-04

2010-06-04T07:30:28Z

Sorry Leo, you are so, so, wrong.
To find the installation key on the CD
(in this case, WIN XP Home Edition)
If it autoruns, exit.
Then START - MY COMPUTER - Right click on the drive your install disk is in, - scroll to EXPLORE - Double click Folder I386 - scroll to WINNT.SIF (1KB)
Open with Notepad.
You can't imagine the elation I felt when I first discovered this. Hope you will feel the same!!

Ah yes, the unattended installation file. Not all people have it, and for most who do the product key therein is bogus and will likely get you the "this is not a valid Windows installation" message some time after you use it. But hey, if you believe it works have at it. I won't.

05-Jun-2010

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Comment from PRADIPTA KUMAR PANDA on 2010-05-12

2010-05-12T07:03:18Z

After entering the product key it is displayed that it is invlid

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Comment from Keith on 2010-05-03

2010-05-03T23:29:54Z

How do I find key on disc if it had been intergrated?

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Comment from Angela on 2010-04-13

2010-04-13T19:00:59Z

So true...thank you!!

When I thought about it this really makes sense.

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Comment from gerald on 2010-04-02

2010-04-02T15:04:32Z

hi ,i thing the product key is not like the original of my license product key..is that?because my prduct key label in hir in my lop top.but i cant see the other letters of that so i try your aplication.. but this is not match in my label..is your key is working?>

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Comment from Conway on 2010-03-03

2010-03-03T19:13:20Z

It's very easy to find the original key if you have the cd, because it is on the cd!! Just follow these simple steps.

1.Insert the Installation CD into your CD or DVD Drive.
2.Explore the CD and navigate to the i386 folder.
3.Open the file UNATTEND.txt and scroll down to the last line.
4.You will find your Windows XP Product key there.

That is not your product key. You'll note that it does not match the key that's printed on your box. Likely you will NOT be able to activate your copy of Windows.

04-Mar-2010

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Comment from matthew on 2009-12-29

2009-12-29T13:06:30Z

hi, yes there is a sample file for an unattended build on all the c.d's, and if you get a few of them you will find that they are all the same product key, sometimes it will work to enable you to load the software, but to activate it, it then goes online and checks your code, to which it will fail.

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Comment from Old Geek on 2009-12-21

2009-12-22T02:32:01Z

Leo,
Thanks for clarification on some topics. I just wanted to clear up some confusion some of your readers may have about the UNATTEND.TXT file. The only purpose of UNATTEND.TXT is to allow you to do an unattended installation (i.e you don't have to answer the prompts during installation). This streamlines and automates installation. The UNATTEND.TXT is a sample. The installer needs to modify this file and include their unique information, including the product key. It can be used to set up multiple computers, but is used with a Uniqueness Database File (UDF), which contains settings unique for each computer, such as machine name.

Good web site. Keep up the good work.

Thanks. Unfortunately we still see lots of people going "OMG! You can use the unattend.txt file!" when, of course, it'll eventually fail either installation or activation when that, as you say, sample key was used.

22-Dec-2009

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Comment from Craig on 2009-12-06

2009-12-06T23:06:06Z

Just to bring all of you peolpe up to speed. NO you can not find the CD on any copy of Windows. It just does not excist. If you do have a file called UNATTEND.TXT, it is simply a file created to allow the cd to be installed to a batch, as in the exact same computers, for a large company that has purchased the systems and computers. It is only reg to those systems and company. It will not work on any computer. The only issue I do have is, even with unattend and putting in the CD key that does come on the computer will not work, even with the proper version of XP. The key is for pro and the key will not work with the copy I have. I end up running through the online verification every time to authorize it.

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Comment from Shane on 2009-11-26

2009-11-27T00:18:28Z

PS,
if you need more specifics such as the laptop make and such to answer this i will oblidge

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Comment from Shane on 2009-11-26

2009-11-27T00:14:21Z

Hi Leo,
does this mean that i can use any windows xp install disk to install the software as long as i have a genuine product key?
I have a laptop with the Windows XP Home Edition product key on a sticker on the underside of the computer. Will this key work to validate a windows installation, regardless of the source of the disk?
Thank you in advance for your assistance
Shane

Note quite. Not all XP Install CDs are the same - they vary depending on version (Pro, Home, etc.), age (with or without SP1, SP2, etc.), language (English, others) and OEM or not (Dell, HP, or full retail). If you get the same one that your product key applies to, then it should work. No way to tell from the product key, but you should be able to tell by looking at your previously installed system.

27-Nov-2009

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Comment from jesse on 2009-10-11

2009-10-12T05:20:27Z

With KeyFinder you can find any key from your computer. Try it out

http://rapidshare.com/files/291860103/Free_KeyFinder.zip.html

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Comment from Tom195 on 2009-09-29

2009-09-30T01:29:00Z

Ummm.......This article is wrong wrong wrong. The product key IS ON THE CD. It is in a folder name I386 and the name of the file is UNATTEND.txt.
Posted by: Sean at April 10, 2009 3:44 PM

Sorry SEAN,
If you have a copy of a CD with a product key, then you already know that you are holding an ILLEGAL, PIRATED copy of Windows.

Windows CDs are NOT individual products with their own product key, which is why the certified label is included with them.

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Comment from charles on 2009-09-24

2009-09-25T02:06:22Z

Leo i have to beg to differ with you about any xp cd will do it will not. i have tow legal copies of windows xp and you can't switch the numbers it says it's incorrect. i have a copy of xp that doesn't require a key or activation to work. when i reformat my computer is offline and therefore has no connection to the outside world so there is no way to see if it is a good key. it all has to do with looking for you to put in the correct string of letters and numbers and compare to whats on the DISK. i have Microsoft office 2003 that like xp requires a string of letters and numbers to continue installation. guess what the product key is on the disk there for comparison.
i have a program that compares two cd's and and shows the difference and there you have it the product keys for both xp cd's.

Till next time

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Comment from Greg on 2009-09-08

2009-09-08T22:30:39Z

Just wanted to offer a correction. The file unattend.txt is a sample configuration file for setting up an unattended installation. It contains sample data, including the product key. The XP installer would not accept this as a valid product key (Whistler version).

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Comment from Pookey on 2009-07-28

2009-07-29T06:06:47Z

All XP Professional RETAIL Disks are the Same. All XP Home RETAIL Disks are the same. The OEM Disks (the ones you get when you buy a pc with Windows on in) are different for each manufacturer. The way OEM works is that the PC maker loads a special file with their OEM "Code" inside. If the "code" matches with your motherboards serial, RAM, Graphics Card, First HDD, First CD Drive, First Floppy (If Present), Memory Controller, Sound Card, Ethernet Card, then windows will install WITHOUT activation. However, if you change a single piece of your pc, windows will need to be activated as it is no longer an "original pre-built" pc.

Retail and VLK keys are also interchangeable and usable on the same CD. You people saying that the key inside UNATEND.txt is real are WRONG. Microsoft add the key so that businesses and PC manufacturers can perform mass installs with the same product key without having to activate. HOWEVER, the key becomes invalid 30 days after the OS was installed so a legitimate key then needs to be entered. The key is never on the disk; instead there is a non-reversable algorithm which checks if the key can be used. When you activate, Windows checks that it hasn't been used to many times.

In the case of Windows Vista, EVERY SINGLE DISK is EXACTLY the same, except, once again, for OEM Disks. All VLK and RETAIL disks are the same and contain EVERY version of Windows Vista.

Some people need to do more research. I know these things because I have my one Windows Keys and i also have a VLK license. I also create unattended and slipstreamed XP Disks.

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Comment from IT Professional on 2009-07-17

2009-07-17T14:40:03Z

Leo is completely incorrect. Not all versions of the install disks are the same. There are MANY different disks, each meant for a specific distro. For example, if you have a legit key from an XP cd you purchased direct from the store, that key will not work with an OS purchased from dell. It will also not activate a system that was installed with a store bought copy of xp that has sp2. If you buy an XP sp2 install disk, it wont work with the origionals. There are also VLK copies, which wont work with retail keys. Sorry for the blatent post, but I found this article specifically because i am coding a program now to validate the serial key to a copy of xp BEFORE installing it, as in the IT field, we run across alot of installs where the customer has the license key, but not the origional content.

I probably should have been clearer, but I wrote "for any given version of a Windows CD, the CDs are all the same". I did not mean to imply that all XP Home's for example are the same, but that all the variations you list comprise different "versions". But if you get two disks of the same OEM's disk of a specific build of a specific variation of Windows XP, all those CDs will be the same.

Bottom line is that I think we're actually in violent agreement - and that I'm not actually "incorrect", just unclear perhaps.

- Leo
18-Jul-2009

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Comment from Deg on 2009-06-02

2009-06-02T10:23:52Z

I have found a genuine xp disk and tried loading it using the number found in the text file, but it did not work and said the product ID is not valid, so I think the batch, or run number seems to be correct, so the cd is of no use, but thanks for the try anyway.

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Comment from Allen on 2009-05-16

2009-05-16T10:01:32Z

Matt, thanx man, you are the only one who knows anything on here.

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Comment from Tony Frost on 2009-04-15

2009-04-15T12:48:44Z

The 'key' in the folder will only get you through the first hurdle when installing Windows. However when it comes to veryifing online, it won't work.

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Comment from Edna on 2009-04-11

2009-04-12T01:35:32Z

Matt, 2/9 poster.. Thank you SO much. You saved me and your suggestion Worked!!! I am so glad that people are not afraid to share their knowledge.

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Comment from Sean on 2009-04-10

2009-04-10T22:44:27Z

Ummm.......This article is wrong wrong wrong. The product key IS ON THE CD. It is in a folder name I386 and the name of the file is UNATTEND.txt.

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Comment from Charolotte Harvey on 2009-03-12

2009-03-13T04:17:55Z

There are several programs out there freeware that you can run and get the xp key code. Microsoft office and internet explorer. One of them is winkeyfinder. Another is jelly bean magic. Just put them in search and follow the links for download

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Comment from Dan on 2009-02-25

2009-02-26T05:35:43Z

bull vista has the key on the cd

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Comment from Matt on 2009-02-09

2009-02-09T19:53:48Z

If you explore the windows cd and open up I386 it does reside in a file named UNATTEND.txt. I have successfully used this on VALID windows installations. Still working to this day, have never been blacklisted.

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Comment from Graham on 2008-10-08

2008-10-08T20:30:50Z

You are wrong, the CD key is stored on windows XP cd's I'm pretty sure with vista as well. I'd have to look up the exact file location, but the CD key is in a text file named UNATTEND, It's either the first or the last thing in the file.

Yep, there's a product key in \I386\unattend.txt and it's the same on all CDs for a specific version or CD-pressing run. It is NOT the same as the key on the outside of the box, and it is not a valid key for you to use on subsequent installations. Since it's not unique I'm guessing that if you attempt to use it activation will probably fail.

- Leo
09-Oct-2008

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Comment from Trevor on 2008-05-09

2008-05-09T22:13:49Z

Wow, I just found your site.
It's amazing!
I know this won't help someone who's lost their CD key.
The first thing I do when I open a CD is use a marker to write the CD key on the printed side of the CD.
That way I can't lose it.

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Comment from Brody on 2008-01-07

2008-01-08T00:22:21Z

Omg thank you sooo much i didn't have the cd key for my windows xp media center cd, but using the "Unattend" system i got it thanks a million!

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Comment from Leo A. Notenboom on 2008-01-07

2008-01-07T19:15:10Z

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

You have to use the CD Key on the same product. CD Keys for
one product or version of a product will not work with
others.

Leo

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (MingW32)

iD8DBQFHgnpNCMEe9B/8oqERAtfoAJ44eijYMSg2Pccd5OULvNhV/mfVxACfcDtu
Om1cEu8nYWnE4eiFMUZHs48=
=HoQu
-----END PGP SIGNATURE-----

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Comment from Robert on 2008-01-06

2008-01-07T03:43:38Z

This does not work!!!!!
It gives you a cd key but it will not proceed get an error.
The Product Id you entered is not valid!

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Comment from Bowlday (IT Pro) Network Spec. on 2007-12-18

2007-12-19T05:08:25Z

Yes, you can get the product key from a windows xp home cd.
How do u think it states the correct key with cd without being online. Leo do you work for MS. Or just didnt know??

Find Windows XP Product Key from the Windows XP CD:

1) Insert Windows XP cd into a working computer.
2) Exit the Autorun introduction.
3) Open "My Computer"
4) Right Click on the Windows XP cd-rom drive and select explore.
5) Open the USWXP32P_ZX folder.
6) Open the sysprep folder.
7) Open unattend.txt

Your CD's product key is contained within the unattend.txt file.

Note: On some system disks, USWXP32P_ZX is a hidden folder..

This is MS OS 101 and perfectly legal

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Comment from Leo A. Notenboom on 2007-05-12

2007-05-13T00:32:29Z

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

It's *a* product key, but it's not the product key on the outside of the box.

My expectation is that this is a placeholder that's meant to be replaced with
your real product key if setting up an unattended installation. I'll bet that
if you use it, your Windows won't activate.

FWIW I found it in \i386\unattend.txt.

Leo
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (MingW32)

iD8DBQFGRlyTCMEe9B/8oqERAnIxAJsFatuuh9zpQxVFZS6ONqJEQ+sqkQCcDbXY
MYzCWoBW36S7Kc8Z64vjVaE=
=ipGj
-----END PGP SIGNATURE-----

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A comment on: How do I find the Windows CD Key from the CD?

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Comment from Rob on 2007-05-11

2007-05-12T01:48:37Z

You can find the XP Key on the CD and it is very easy to do.Put the XP CD in your Drive and right click explore.Now click on search and type in Unattend. When search finds this file on your CD, open it with NotePad and scroll down to the bottom, and there in all it's Glory will be your XP CD KEY.

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Comment from Leo A. Notenboom on 2007-03-03

2007-03-03T17:53:57Z

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

There are two things that validate keys:

1) they are not just a random string. There's an algorithm that
determines what is and is not a valid key. So you can't just enter a
random string of characters and have it work. Only actual, valid keys
will work.

2) activation. Normally you activate over the internet, and that double
checks whether the key has been used previously. If you're not connected
to the internet, I believe phone activation is required and would do the
same thing.

Leo
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (MingW32)

iD8DBQFF6bZfCMEe9B/8oqERAhjCAJ9v+KENW2rt/slww/7h31ZiLgVWxgCfcjQ+
jSNwUcu+C1VyPJYS4coticM=
=19jV
-----END PGP SIGNATURE-----

]]>

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Comment from Kerrie on 2007-03-01

2007-03-01T18:29:09Z

I understand why the product key is not on the CD. And I understand that you are basically purchasing the product key. But.. how does the computer know you are using a unique key? I'm not connected to the internet.

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Comment from ghghgh on 2007-02-22

2007-02-22T13:18:43Z

search unattended in the search facillity and search the disk. it should be a txt file and its in ther

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Comment from Leo Notenboom on 2006-12-07

2006-12-08T02:11:38Z

Any SP2 XP Home CD will work fine.

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Comment from Nigel on 2006-12-07

2006-12-07T15:17:18Z

im preparing to reinstall windows xp sp2 home edition...i have a genuine installation key but i cant find my cd...would it make a difference if i used another windows xp sp2 home edition cd to install it as long as i have my original key???

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

2006-08-08T16:12:08Z

You'll need to purchase a key, or a CD with a key.

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Comment from martin on 2006-08-07

2006-08-07T16:33:41Z

i have installable cd for windows xp home edison but i dont have cdkey how can i start windows

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Comment from Leo on 2006-05-23

2006-05-24T03:49:32Z

Thanks for letting me know. I've contacted keyrecover.com.

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Comment from En-Cu-Kou on 2006-05-23

2006-05-24T03:09:27Z

Hello
I visited the site mentioned above (keyrecover.com), and found out they have a copy of this article in their Resources section -- except the link to the free KeyFinder is simply changed to one for their non-free KeyRecover! If that's not a crime in America, it's at least beyond rude.
No comment about the implications about the trustworthiness of KeyRecover corp.

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Comment from Russell Taylor on 2006-05-15

2006-05-15T19:14:08Z

There is a program that will find your product key for you. it works with microsoft windows and office. you can view or change your keys with it.
www.keyrecover.com

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