Comments for Why does my computer randomly reboot without warning?

Comment from SREENIVASA REDDY on 2012-02-04

2012-02-04T17:21:03Z

My computer(XP) restarts repeatedly when i connect my old unboot(badsector problem) HDD through SATA/IDE to USB Adaptor Cable for backup my Data. and if I remove USB Cable System Runs without Problem.

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Comment from Jouke van der Maas on 2011-10-31

2011-10-31T19:00:43Z

My brother had this problem. It turned out his computer manufacturer had created a bunch of tasks in the task sheduler to reboot his computer every day at specific times. I know this may be a bit far fetched, but it might just solve the problem.

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Comment from Yeppers on 2011-08-25

2011-08-25T17:40:14Z

Leo, if after a random re-boot occurs, a Windows XP message pops us that says, “The system has recovered from a serious error”, and the Error Report Contents window shows a couple of files in a …\Locals~1\Temp… folder, does this mean that the random re-boot was probably caused by a software glitch? Is this an indication that a hardware problem probably is not the cause? This has been occurring recently about once or twice a month. Anti-malware scans are all clean and I have not installed any new hardware for a long time. Thanks…

Unfortunately we can't infer either way. Could be hardware or software.

25-Aug-2011

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Comment from Faizan on 2011-08-07

2011-08-08T06:36:01Z

i tried your tips to fix the problem on my GF laptop, now the same problem appeared in my Dad PC and it didn't worked then i followed the tips mentioned in this guide:
Source: http://ezinearticles.com/?Computer-Randomly-Restarts!-How-to-Fix-a-Computer-That-Restarts-Randomly&id=4247551
it really fixed the problem but i m a bit confuse that why your suggested method didn't worked this time.

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Comment from shekhar on 2011-06-09

2011-06-10T06:51:42Z

check your Ups and Power Voltage

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Comment from David on 2011-03-18

2011-03-19T03:09:56Z

So since we on the topic of computer randomly rebooting I have my question. My computer will randomly restart when playing video games. Ive replaced the motherboard, processor, ram, power supply, videocard, everything but the case and CD rom. Im running a I5 750 8 Gigs of DDR3, GTX 275, WIN 7 64 Bit, 1200 Wat power supply. After i have replaced everything it STILL does it. Any ideas. During this last buid I put on a water cooling set so I KNOW its not over heating. Fresh install of WIN 7 and every driver is up to date. The only thing left is my case. ITs an antec 900 Case. Ive read a lot of forums and i havnt read anything suggesting that it could be the case but besides that it is the CD ROM. ANY Help would be appreciated. I took my computer to a shop and they have no idea what it could be everyone is STUMPED.

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Comment from Lenette on 2011-02-11

2011-02-12T01:16:40Z

I have a problem with random reboots and I am runing Vista. I have virus and spyware protection on my system. Often when the computer reboots the graphics are out of sync. Are there any other areas that I should look into?

The article you just commented on has the general approach. Beyond that it would take more details or a technician to take a look at the machine.

12-Feb-2011

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Comment from Majo on 2011-01-22

2011-01-22T13:38:25Z

I got this problem for about one year now and just can't and can't fix it, my dad already tasted my video card, Processor, RAM and motherboard, it still kept rebooting or freezing randomly, the next step was installing Linux and putted the Processor to 99% performance, it ran for around 2 days and the comupter didn't reboot. after I went back to my windows XP and it rebooted again, than I even installed windows 7 and still rebooted. today I even changed my Hard Disk and it is still rebooting sometimes.. I dont know what to do anymore

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Comment from Ron on 2010-10-04

2010-10-04T19:28:01Z

I recently built my current system and it works great when just doing general everyday computing, but when I try to play Age of Conan, I can only play a few minutes before my computer reboots. I thought it was an overheating issue as I installed Speedfan and saw my CPU would heat up to 55-60C and GPU would reach 70-75C before reboot. But I can play Lord of the Rings and while the same temperatures are reached, my computer doesn't reboot. I contacted AoC tech and they tell me they know of no know issue that would cause this and it sounds like a hardware issue. Well, if it were a hardware issue, why doesn't it happen when I play LOTR?

Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.100427-1636)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 05/21/10 12:07:52 Ver: 08.00.15
Processor: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz (4 CPUs)
Memory: 3580MB RAM
Page File: 479MB used, 4983MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)

Card name: NVIDIA GeForce GTX 275
Manufacturer: NVIDIA
Chip type: GeForce GTX 275
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_05E6&SUBSYS_0E0619F1&REV_A1
Display Memory: 896.0 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0012.5896 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 7/9/2010 18:38:00, 6343040 bytes

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Comment from idontknow on 2010-08-30

2010-08-30T18:40:14Z

Click here to read an article about troubleshooting random computer restarts.

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Comment from PC PAL on 2010-08-12

2010-08-12T12:38:01Z

This sound like the system is over heating. clean the systems fans out as CPU's have a fail safe which switchs the machine off or restarts it. I see this alot on laptop repairs.

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Comment from Shah on 2010-06-10

2010-06-10T16:04:39Z

Have the same prob, the main power supply is overheat and if u cont, it will burn causing loss of memery.

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Comment from Ruselrones on 2010-04-28

2010-04-28T13:29:17Z

I had a sp2 in my Lenovo computer but when I switched to Windows vista after some time it gives blue death screen and sometimes it rebooting again and my warranty period has been over so I moved to Computer repairs sheffield and got a solution from there , actually it was not because of changing the OS but because of some registry problem and somewhat other problems so I advise to try registry cleaner for this problem.

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Comment from haseebullah on 2010-04-12

2010-04-12T13:00:37Z

my domputer does not start normally and reboot repeatedly
how can i restore my pc through cmd to an ealier time.
thank.

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Comment from Steve B on 2010-04-07

2010-04-07T17:38:40Z

Please Please Please DO NOT VACUUM YOUR COMPUTER. If you want to build up a static charge and kill components, this is an easy way to do so. Computer stores sell compressed air for a reason.

Things to look for to provide further diagnosis

1. Capacitors - google image search this to get an idea for what they look like. They should not appear to either leak or be "pregnant". If they are smooth on top, and not leaking, you are good. Otherwise you are not.

2. Download a bootable copy of Knoppix Linux and burn it to CD. Run it on randomly restarting computer. Go on internet etc, and just try leaving it on for a while. If it doesn't restart, you are likely (but not 100%) dealing with a software issue that has made windows unbootable, or some other software issue which causes random crashes.

3. In this modern day and age, cooling can be rather critical. Your video card, CPU, Northbrdige and Southbridge should all be cooled. Random power offs can be caused by any. The CPU and Video cards will have fans. Watch the fans and see if they stop spinning or struggle to spin. Please note that your computer will likely slow the fans down in order to keep your machine quiet, so slow fans may also not be the issue.

4. While the power supply could be the issue, the power cord could also be an issue too. Try a different one. If issue persists return it to Best Buy for full refund. A nice solution that doesn't violate your warranty.

Cleaning out your computer with compressed air can also help. The most important things to check over are "Did I make a recent change" as this would likely be the cause, and if not "Is everything in here working". Eliminate the fans by watching/cleaning/replacing them, eliminate software with the knoppix, then start looking at the other culprits - leaking caps, and bad Power Supply.

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Comment from sal on 2010-04-01

2010-04-01T07:12:08Z

i have this e-machine that when it boots up the pc goes into a self diagnosis pc display settings correct

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Comment from Ravindra on 2010-03-28

2010-03-29T05:20:22Z

My pc was also rebooting without warning. I guess it started after installing MS Visio 2010 Beta. I only had XP SP2. Office 2010 requires SP3 for XP. So installing sp3 solved my problem.

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Comment from Fazy on 2010-03-03

2010-03-03T11:49:31Z

hy. my computer is restarting without reason. it appears a black screen and restarts. I dont know what to do. I'm in the middle of something and the ps is restarting. i cant even save what i'm doing. please help

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Comment from Gerard Mannarino on 2010-02-23

2010-02-23T18:02:04Z

My computer reboots without warning. However, if I change the electrical source (different outlet in another room) it works fine. If I put an extension cord onit using the outlet that workd it shuts down and restarts again. An electrician and the power company has checked the power and said all is fine. I then plugged a different PC into the original outlet and it works fine.
HELP!

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Comment from J Payne on 2010-01-13

2010-01-14T04:21:26Z

I had posted a few months back about my computer restarting itself... Turns out it was a motherboard issue. I noticed (by accident) that the capacitors had starting crapping out. Replaced the mb and no more issues. an Ebay $39.00 fix

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Comment from Knox on 2009-12-20

2009-12-20T08:54:10Z

I'm having the same problem. However i've found out the solution lies on the ram. If i remove one ram out, it's fine. Although my motherboard max ram is 2gb, it can't take 2gb. 1gb + 512mb works fine, but not 2Gb im not sure why but hey it works :(

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Comment from Jesus Bolivar on 2009-11-13

2009-11-13T18:31:10Z

hi im having some issues with my computer, sometime my desktop just reboot by itself, sometimes after 5 min sometimes after a couple of hours, after the first reboot it keep doing again and again until i just shut the power, at this moment the case is open so is not the temperature, i check the memory ram, remove 1 of them and use just one memory then i switch the memory and the same, update the BIOS on my MOBO, reinstall the windows, check the power supply using a power supply tester, plug the power supply tester, turn or the power supply and leave it like this arround 1 hour and it work fine but when i connect everything else and the problem keep comming, on the BIOS show me the internal temperature at 46 C and the CPU temperature at 38 C, remove all the hardware and leave just the HDD and one cd drive but nothing, remove the CPU fan and clean it, add more cooling paste on the CPU... i dont know what else can i check, PLEASE I NEED SOME HELP!!!!!! who can give me some ideas about how to fix this??? im using an intel mobo G35EC with the cpu E8400, 2 Gb ram 800 mhz, the video card is an XFX 9800 gt, the power supply is 550W, changed the CPU fan a while ago...

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Comment from TJ Forster on 2009-11-08

2009-11-09T03:10:31Z

hi Leo. i have a computer that loves to randomly restart itself. it is not over heating becuase i have alot of fans and there is no dust. also it loves to randomly show the blue screen of death. i tried everything posseible to keep this from happening. i am running windows media center eddition with the latest pack. thanks

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Comment from Salohcin Knurb on 2009-09-19

2009-09-19T11:22:29Z

Computer shuts down every 25 mins. while playing solitare ; sometimes more often ; the screen that allows restart options is presented "sometimes" not everytime ; taking to the shop "again" Monday . it only occurs while playing solitare "KingSol". E Mail and E Net are okay . Salohcin

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Comment from J Payne on 2009-09-02

2009-09-03T04:04:42Z

My computer has developed a strange problem in restarting itself... When the computer is first turned on in the morning it will restart itself or freeze instantly... If i keep rebooting or allowing it to restart, It will go a little further in the boot process until it eventually reaches the desktop. After many restarts it eventually runs fine. If I should restart the computer for any reason while it's up and running it has no problem in completing its booting process. Problem seems to only happen when the computer has been shut off for 30 minutes or so.

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Comment from Darko on 2009-08-29

2009-08-29T12:09:35Z

hi Leo i have a problem with randomly reboot
my computer reboot it selfe all the time
some time i must restar 10 times to start up windows i try other windows but same thing
reinstaling it everything but all the same
then something get on my minde and i try
to put usb mouse bicause my friend tell me that
and when i put usb mouse its restart again but for lesser time. i have no virus or enything like that can you tell me what can i do to fix that
pls man send me a mail on [e-mail address removed]
and tell me everithing what can i do to fix that
pls man.

Please read the article you just commented on.

28-Aug-2009

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Comment from Jen Marion on 2009-06-27

2009-06-27T13:51:38Z

Leo. I have external fans running on my PC which appear to keep it cool for now. My computer restarts itself only when I use it. That is....if I leave it running day and night without actually using it, it will stay on. As soon as I browse or begin to open up files or emails it starts to restart over and over after a few minutes. Likewise, as soon as I leave the computer it stops restarting.
If it was the fan causing this it would happen all the time wouldn't it?
It's like it's possessed.it knows when i'm there.

Many computers actually generate more heat when they're being used. So it could still be an overheating issue, but of course it could be a software issue as well.

- Leo
28-Jun-2009

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Comment from Ed on 2009-04-18

2009-04-19T02:54:40Z

Nick. The problem you are having is a faulty power button. Simply replace with a new power button and your problem will go away. It's a very inexpensive fix.

Your power button is sticking when you press it. When you hold down the power button on any PC for 4 seconds, it will force a shutdown. It's a feature that is used to shutdown a computer that has had a fatal crash and isn't responding.

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Comment from Nick on 2009-04-17

2009-04-18T01:36:07Z

Hi Leo! Gud Day!

I hav a problem to my computer.. it seems when i turn.on my computer by pushing the Turn.on switch.. it Restarts after 4-6 seconds..? I hav already check all the possible reasons that may cause my computer from restarting... there are time that when i fix it, it goes back to normal condition... after a few days.. that problem returns again from turning it on.. wat should i do?

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Comment from chippy on 2009-03-12

2009-03-12T22:27:25Z

Had similar problem on my laptop. It was overheating. Blew out the dust and it got a lot better. Have to do that every so often. Also defragment your hard drive to keep things running smooth.

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Comment from Holger on 2009-01-14

2009-01-14T13:25:14Z

Also a common cause for random or multiple rebootes are defect capacitors around the CPU. (See http://www.elko-verkauf.de/html/schadensbilder.html)
This capacitors have to be replaced.
If you know someone with some experience in soldering, or you can do it yourself, it is a cheap repair.

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Comment from Randy on 2008-12-24

2008-12-24T16:14:29Z

I didn't see any mention of this but just as you should have anti-virus software installed and running, do not run two AV programs at the same time. That is guaranteed to cause system problems.

To be clear, it's the real-time scanning that typically causes problems: do not have two AV programs installed and have both of their real-time scans enabled.

- Leo
25-Dec-2008

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Comment from Steve on 2008-06-20

2008-06-20T22:26:42Z

After trying all of the above, I realized IT WAS THE POWER/RESTART BUTTON WHICH WAS BAD!!! SIMPLY DISCONNECT FROM THE MOTHERBOARD TO TEST IT.

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Comment from Robert on 2007-10-16

2007-10-17T02:24:55Z

I remember reading this article last time for Windows 98/ME/XP. Now I have Vista and it all still aplies. I have been able to narrow down my memory/drivers/CARDS/internet explorer/ and just about everything else....
I opened up the case and looked around and found that the CPU Fan power cord was loose. AKA the reason for the shut downs. Thanks to you, after reading you article here I poked around and found this. Gateway="on purpose eat your computer up." Actually probably just a distraught assembly line worker. I have a GT 5432. So far so good....
Still thinking of the 500 watt power supply though.:-)Again thank you for some common sense in a typical problem.

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Comment from Paul on 2007-09-26

2007-09-27T04:21:38Z

I had comodo firewall 2.4 on a work computer on a network and it started rebooting without warning (even when the pc was unattended). When rebooted the pc would say that it had recovered from a serious error. I removed comodo and no more reboots.

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Comment from jamie on 2007-04-16

2007-04-16T16:45:06Z

my computer was covered in **** basically lol i threw away the master reset CD along with the windows XP CD key that was attached to the cd wallet. extremely stupid i know lol but yeah so after 20gb of my memory was "lost in space" (i could not find it ANYWHERE) so i attempted to master reset myself. also VERY stupid. seems the application i downloaded from Packard Bell was only to initialize the master reset, not actually do it. so, my computer was buggered. i took it to an IT techinician i knew very well and he had to re-install windows XP, but, because he was an IT tech, he had used the version of windows already, so mine became susseptible (dont know how to spell it) to WGA at the next windows update i got. i got another friend to find an application to remove the annoyingness of it, but because my windows version had already been used, i no longer recieve the updates =( this was 5months ago, and i have installed the minimum on my computer, Comodo Firewall and Anti-Virus, Ad-Aware SE Personal, and my games. (i only installed the anti virus and firewall when i started to get the random reboots) but i do get a "serious system error" message whenever i turn on my comp.

C:\DOCUME~1\Jamie\LOCALS~1\Temp\WERdc6c.dir00\Mini041607-05.dmp
C:\DOCUME~1\Jamie\LOCALS~1\Temp\WERdc6c.dir00\sysdata.xml

they are the 2 files included in my error report, although i never send them. it wont improve my situation so no point lol. i cant find where them folders/files are located either, hope someone can shed light on this.

(oh i dont know that IT tech anymore, moved away =( lol )

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Comment from James Nell on 2007-03-04

2007-03-04T20:03:35Z

Denial of Service "Ping of Death" attack detected.
I get this on my sygate firewall , what is it and why would someone want to restart my pc,My firewall stops the atack but it also slows my internet conection , I can do without the atacks , 5 in the last hour, help pls.
Description:
In a Ping of Death attack, the hacker uses a packet with a size that is larger than the normal standard. When your system encounters a packet of this size, it often crashes, hangs, or reboots.

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Comment from Dimitri on 2007-02-25

2007-02-25T12:28:01Z

The problems started when I have installed some gadjets od Google side bar.
I will remove them, to see if I can repair the problem.
You site was very helpfull to me.

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Comment from Mark on 2007-01-09

2007-01-09T18:37:20Z

My computer randomly shuts down and when I have it on I can tell the fan is running fine. I have Windows XP but it still randomly restarts. Also when I have it on, it sounds like my computer is playing ping pong. It has these weird beeping sounds like a video game of ping pong.

I went to Radio Shack and bought some dust remover spray which helped a little bit but if I leave my computer running all day it will either restart, or freeze. I've been having a lot of freezes lately as well. When I try to run scans and just leave the computer it will restart, or freeze. So as I'm running a scan I have to continue to keep the computer from going to idle.

If someone knows how to help please send me an email.

mcnba@hotmail.com

THANKS!

MARK

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Comment from janusz on 2007-01-02

2007-01-03T02:13:52Z

There is no ONE solution. What works for one may not for others.

I, too, HAD a random reboot problem. I went through all the usual things from upgrading audio drivers, changing video cards, updating BIOS, new BIOS battery, RAM memory checks, changed IDE cables, and on and on. Power supply is 430 watt and plenty big for my pc. I am using APC UPS so it was not incoming power (verified). Temperature was not an issue so I was left with the possibility it was a defective MB or CPU.

I spent countless hours trying to isolate the reboot to certain things but never could -- but I did notice that it was more likely to occur when I first started the pc in the morning. I set the BIOS to do a full memory scan -- which can take 30 seconds or so -- in order to see how the pc responded. It seemed to stabilize things such that I would not experience a spontaneous reboot for days (I ran it 48 hours). The next time I started the system it seemed to go okay until I clicked on a desktop shortcut -- ZAP! Reboot! I became suspicious of the hard drives (2) so ran the manufacturer's diagnostic program and both HDs are perfectly okay.

My questions were "What could it be about perfectly okay hard drives that when a program is access by desktop shortcut, it would reboot?" and "What are the controllable features of a HD?"

This led me to the master-slave jumper connections. For some reason, I had the HD0 set to Cable Select and the HD1 set correctly to Slave. Both drives needed to be set for Cable Select or one Master and the other as Slave. I changed the jumper on HD0 to Master. Problem solved.

So, include master-slave jumper check on your HDs in your troubleshooting!

I'm no tech by any means. I can only assume that the HD controller was confused on initial startup as to which drive was the Master but once established it stayed with that setting for that session.

I hope this helps.

janusz

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A comment on: Why does my computer randomly reboot without warning?

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Comment from yeosh on 2006-12-08

2006-12-09T07:28:57Z

ok i read the article and the comments. this is all good stuff. my computer does not get BSODs i already turned off the "automatically restart on system failure" configuration. overheating is not an issue with my computer, i also replaced the thermal paste on my heatsink and processor. my memory isnt bad either, nor are my hard drives overheating. all my software is up to date and the only thing that i havent tried is disabling windows updates. i didnt really notice that whenever i turn on my computer i do get that yellow shield icon on my system tray then it just restarts... but heres my problem, even tho i dont get into windows, my computer restarts. i used a diifferent hard drive without a operating system just to test that out. i left it for a few minutes and it restarted. even in the BIOS settings page it restarts. so im thinking hardware issues. since its not the memory, hard drive, or the processor (maybe it is i just dont know it). what else could it be?

on a side note: when i used the integrated video card on the motherboard instead of my video card, my computer crashes. also whenever my computer reboots into windows, my wireless adapter has to be removed and then reinserted into the USB port for it to be detected by windows.... maybe this might help come to a conclusion. im all out of answers maybe anyone here can help me out... THanKS

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Comment from Dirk on 2006-11-30

2006-11-30T16:34:49Z

I have had the same problem. It started after some other problems developed. Their could be a missing or corrupt file.

Try truning Windows Update off and see if the problem goes away.

Anti Virus was downloading an update, then started an install. Windows Update was also downloading an update, then started an install while the other install was still running.

I started getting Anti Virus error messages, contacted the vendor, and they had ne re-download and install the update.

Then the Windows Update icon would appear in the SYSTRAY, and disapear after a minute. No updates were installed. I went to the Windows Update site, and there were updates waiting. I downloaded and installed them, then Windows Update would start an install and install the updates again.

Microsoft support had me re-install SP2 without cleanup, then my computer would restart without warning every time there was an update.

For the past 9 months Microsoft has had me do over 100 emails of commands, re-installs, and recoveries. Windows Update is in manual mode and I have to check for updates. Even when I do a manual install, the computer restarts.

I have checked everything on this site, and did not find anything that has'nt already been tried.

The Microsoft support people keep saying I can't help you, contact support. I get a new person each time, and they wnat to start all over with all of the things that have already been tried.

THEY WILL NOT GO OUTSIDE SUPPORT FOR HELP!
They appear to be more worried that if they have to ask for help, it would not look good on their record.

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Comment from Ivan Tadej on 2006-08-08

2006-08-08T21:27:45Z

Well, I must say that it seems quite strange to me that nobody has mentioned yet the most obvious thing to do in this particular case, i.e. nobody mentioned that the computer's restarts might just be common BSODs (well, Leo did mention a BSOD, but ...), which in turn can be caused by anything really (i.e. the BSODs themselves), and that the first thing you should do is the following:

-- go to "Control Panel", open the "System" applet, and navigate to the "Advanced" tab. Then under the "Startup and Recovery" section click "Settings" button, and finally in the window that opens-up check you current setting (it's a check-box) for "Automatically restart" under the "System failure" section.

/IMPORTANT: If the respective check-box is CHECKED, then you need to UN-CHECK it. This way you will be sure on the next occurance that the reason for these restarts is actually a BSOD and not something else, for instance a too high temperature etc. However, there is also a slight chance that you'll at least get some clue on what's causing it (of course, if it's indeed the BSOD) by the "stop error-code" displayed on the BSOD's blue-screen (under "Technical Information"), and if you are lucky enough, you may even get a file-name of the driver that's causing it.

________

best regards,
Ivan Tadej, Slovenija, EU
http://www.tadej-ivan.be/

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Comment from Greg Bulmash on 2006-08-02

2006-08-02T21:30:12Z

Aside from checking the computer's power supply, you may also want to check the power supply's power supply, your home wiring.

We're conditioned to believe that we'll get a consistent voltage from our home wiring, but it's not as consistent as we think and can spike and dip. That's why major datacenters (the ones that host big racks of servers) and hardcore audiophiles and videophiles use power line conditioning to iron out those peaks, valleys, and frequency distortions into a smooth, clean, flow of power. See http://en.wikipedia.org/wiki/Power_line_conditioner

Consumer models run from $40 - $500 depending on how much you want to plug into them and how hardcore you want to get about the voltage and frequency regulation.

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A comment on: Why does my computer randomly reboot without warning?

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Comment from mark on 2006-08-01

2006-08-02T03:31:22Z

Hardware-wise I have to go with the over heating option as a first try after all the software stuff checks out. My comp was doing this to me recently and once I gave her a good cleaning, things worked better. The fans checked out ok, but if you have a ton of dust in the machine, they simply may not be able to keep up. Clean out your machines once in a while. Its the often the difference between the cost of a can of compressed air and the cost of a new processor. If that fan dies and your processorover heats....bad news....

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A comment on: Why does my computer randomly reboot without warning?

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