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Computer Restarts Randomly In Windows 7

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September 7, 2011 2:07:58 PM

Hello :hello: 

First great site you have here.

plz help me resolve that problem in my computer, because this problem has utterly stumped me.

So basically I'm in the middle of something and my pc just dies, not so much shuts down more like a power failure, then restarts itself. This happens all the time. Sometimes the reboot ocuurs while the pc is starting and happears a message that says the computer was unable to start.But strangely when I use large programs like when I play games like wow or aion the computer doenst reboot, I can play for hours perfectly, and in safe mode occures the same i can be on the computer in safe mode for hours doing any thing that doensnt reboot.(NOTE: sometimes the pc just freezes instead of rebooting but when it freezes I cant do anithing so I have to reboot my computer( I have to reboot the same -.-).

When the computer reboots doenst happear a blue ecran screen of dead, its like a power failure.

My problem its just like when its describe in this site he doensnt show a solution to the problem. Here is the link to the site: http://www.ifmdb.com/computers_hardware-computer-restar...

Plz help with this problem and note that IM NOT AN EXPERT ON COMPUTERS so much of tech language I dont understand, and sorry because of my bad english. And please reply something. ty for your help.




September 7, 2011 2:25:00 PM

Hey buddy welcome!

If you dont mind, can you tell us as much information as possible as to what you computer is?

Is it home built or manufacture. If manufactured, what is your model and how old is it. When did this issue start?

Most likely, a PC shutting down like this could be caused by either: 1. Power issue or 2. Overheating

If it's over heating, most likely, you just need to take it outside, open up the case and blow out all the fans and heatsinks with a can of compressed air or air compressor (please note, make sure the air compressor has no moisture built up in the hose before spraying it in the computer. Water+computers=bad)

The other thing is power issues. This can be caused by a few things, bad power supply, bad wall outlet, or most likely bad capacitors on your motherboard. Open your computer again, take a look at the capacitors on your computer. Most likely, if it's an older computer, the capacitors would be bulging out and or leaking (looks like mold is growing on them) this would be your sign of a bad motherboard which we all hope is not the issue ;) .

let us know!

Thanks

Rozz
September 7, 2011 2:52:35 PM

+1 rozz, we need some more info on your build.

However, is your CPU overclocked? Download and run Prime95 and HWMonitor. See what temperature your CPU gets to under a stress-test (and also, see if it causes your PC to reset). Assuming that's OK, try and run your system for a while with a different PSU and see if the problem continues. If you're not already, I'd also get a surge protector - could well be variations in supply voltage (which gives you wider problems if this is the cause and your PC is resetting as much as you indicate).

Let us know how you get on. :) 
Related resources
September 7, 2011 7:28:17 PM

Sorry here is my specs:

- Toshiba Satelite A300
- Windows 7 64-bit
- Intel Core 2 Duo CPU T9400 @ 2.53GHz



No my CPU is not overclocked. (diellur)
I dont think its overheating problem because has I said I can run a game or large programs perfectly for hours without the computer reboots. Its manufactured and have around 2 years. The issue has start about 2 months ago.

plz reply and let me know if you need more information, because Im not an expert on computers.

Ah and one thing diellur how I run my system for a while with a different PSU? Sorry but Im not an expert in these assunts :??: 
September 7, 2011 8:14:44 PM

PSU is Power Supply Unit. You may have a bad battery. If you use the laptop constantly and never really unplug it from the wall, the battery may of become unstable over time. try removing the battery, and running off wall power exclusively and see if it blue screens. If it doesnt, try putting the battery back in, see if it blue screens. if it does, then you have found your problem.

Even though the laptop is plugged into the wall, the laptop still draws its power from the battery (just while charging simultaneously). If you ever use your laptop consistently from the wall outlet, it's good practice to have the battery removed.
September 7, 2011 8:49:52 PM

Yes this is what I have think because in the icon of the battery on the taskbar have appeared an error saying that the battery needs replacing and with an note that was saying that your computer may shut down suddenly, so I have associated my problem to the battery.
So I have removed the battery and try the computer without it and the problem persist and rozz in my case I dont have a blue screen when the computer shut down, its like a power failure. (note that the icon saying that the battery needs replacing I think that have already appeared before the problem of the reboots ( I THINK NOT ABSOLUTE SURE).
Ah and I have disable the option of automatically restart and no error appear.

One more thing I know what is the PSU but I need to know how I run my system with a different PSU like diellur have suggested plz help

And can you explain me what diellur wants to say with that, or diellur himself :
If you're not already, I'd also get a surge protector - could well be variations in supply voltage (which gives you wider problems if this is the cause and your PC is resetting as much as you indicate).

Ty for helping me and Im waiting for response :) .
a b $ Windows 7
September 7, 2011 9:04:34 PM

I thought that was SOP on W7. It's one of the few things you can't find on XP.
September 7, 2011 9:48:10 PM

Laptop are built to shut down when there is power fluctuation that come from batteries. Disregard my "blue screen" comment - i ment to say shut down. Running strait from wall power should resolve the issue. I believe what dielurr wanted was for you to get a new PSU (many tech have spares laying around). As since this is an issue to a laptop, i am going to suppose you dont have a new PSU (the brick that plugs into the wall and chargers you computer).
September 7, 2011 10:10:46 PM

Let me see that I have understand, you are saying that the problem is from the PSU and you are saying that the laptop shut down when there is power flutuation, but if you are saying that, why the computer dont reboot in safe mode? laptop needs energy to work in safe mode.

Sorry for my bad english and not know much about this tech language.

Waiting for reply
September 8, 2011 9:34:12 AM

Ahhhh and I have remember of one thing.
I have said that the problem has started in about two months ago and it was, but in the first month the reboots were less, for example , there was one day that I have had a reboot but only after two days ocurred another reboot.
But in the second month the reboots began each hour, the computer reboot , one hour later another reboot, and now its not even an hour its like 10/15 min. sometimes 30 min.

hope this is information helps you

waiting for reply
September 8, 2011 12:25:36 PM

I have already format my computer because I was thinking that was a virus or something like that I will try the run disk defragmenter.
September 8, 2011 1:03:30 PM

Are you still running it without the battery?
September 8, 2011 1:33:19 PM

Yes Im running it without the battery but in safe mode because on normal mode he reboots , reboots without the battery and with the battery in normal mode.
September 8, 2011 1:46:43 PM

Lets try running a memory test.

http://www.sevenforums.com/tutorials/715-memory-diagnos...

Let see if you get any errors of if the PC restarts on this. Since safe mode is pretty much a stripped Windows 7 OS (no extra software running) it could be a bad memory module. My only issue with this is that it usually throws a BSOD on bad memory. But hey, it's worth a try.

Let me do some more research on your laptop. I do know that laptops like the Lenovo T400 had a similar issue where the board 'thought' it was overheating and shut down when in reality it wasn't. It was caused by a faulty motherboard sensor though..
September 8, 2011 3:21:03 PM

Only 2 things I've come across does this on desktops- PSU's and RAM. Dunno 'bout laptops, though.

So check your power supply and run memtest86.
September 8, 2011 6:16:41 PM

I have run the windows memory diagnost and no errors Im gonna try memtest86 and see if he search for any problem.
How I check my power supply? sorry Im a newcomer :/ 

When the memtest was finish I let you know.
September 8, 2011 8:21:09 PM

Calguyhunk can I use memtest 4.0 it does the same or not????
September 9, 2011 4:38:51 AM

Sasuke22 said:
Calguyhunk can I use memtest 4.0 it does the same or not????
Pobably does the same thing. I use the original memtest86.

Do one thing. Check the temps with Core-Temp. If the temps are within the rated tj max for your CPU and memtest doesn't return anything, and your computer still continues to reboot, check Device Manager for errors.

If nothing shows up, it is likely that it's a software related issue. Either a virus or an operating system related issue. To help make sure this is the case, try these -

Press f8 or something immediately after the manufacturer's logo disappears from screen on boot-up, and choose "Last known good config".

If that works, good. If it doesn't, reboot the computer and enter the BIOS setup and let the computer sit.

If the computer does not turn off, it is likely that your Windows installation is corrupt. You'll prolly just have to format and re-install in that case.

Please carefully go through my post and go through these steps diligently. If nothing works, I'm at my wit's end. You prolly need to take it to the service center.
September 9, 2011 9:35:51 AM

I have tried memtest86 and no errors.

Im gonna install temp core, registry cleaner and system cleaner.

And do these steps:

Press f8 or something immediately after the manufacturer's logo disappears from screen on boot-up, and choose "Last known good config".

If that works, good. If it doesn't, reboot the computer and enter the BIOS setup and let the computer sit.

If the computer does not turn off, it is likely that your Windows installation is corrupt. You'll prolly just have to format and re-install in that case.


But only one thing I have heard a commentary when I was doing the download of registry cleaner is that true? Here is the comment:

I hope nobody really uses these registry cleaners. Registry cleaners often cause more damage to your Windows system than anything. They render a lot of programs inoperable and can render your operating system useless. Never download or use anything that claims it can "fix it all in one click."


September 9, 2011 12:53:23 PM

I have run memtest 4.0 also, and when it was running the computer hasnt reboot , really strange.
Well there are 3 things that dont make the computer reboot:

- In Safe Mode

- While Im playing a game like wow or aion

- when memtest 4.0 is running and checking the memory

The result of the test on memtest 4.0 was no errors but I only have checked 3 GB because it doesnt support 4GB, I have 4 GB RAM.

I have search and I have founded two cases similar to mine and they have the same solution, should I try reduce the voltage of RAM like they have done?

these are the two cases:

http://www.tomshardware.co.uk/forum/274657-13-computer-...

http://www.tomshardware.co.uk/forum/270507-13-windows-r...

If you agree that I can try , How I change my RAM voltage ????????

September 9, 2011 1:15:22 PM

I wouldn't mess with RAM voltage unless you really know what you are doing. Besides, unless you specifically changed the voltage in the past, they should be at their stock values.

Sounds like a power issue to me, but being a laptop, that's not as easily tested or even solved like it would be on a desktop. If you haven't added anything to the laptop, the power supply should be able to handle the load, which suggests the power supply itself is bad. Yet, without having the laptop to test the voltage of the supply to make sure everything is according to spec, there is not much we can do about that. You might have to take it to a respectable service shop and have them test it. Plus, with the added benefit of them seeing it, they may notice something that you have failed to mention because you don't know it is even relevent. Good luck with it.
September 9, 2011 2:00:38 PM

As for the RAM voltages, quite the opposite. You should actually get into the bios and set everything on default & try to boot from there to see if the problem is resolved.

I don't know why it doesn't act up while you're playing games, but everything else points towards software failure (you hope that's the case, as it'll be free and painless :) ). Actually, it has to be, since it works alright in safe mode. That is indeed the case, right?

If so, I think backing up your data externally and then re-installing after formatting all the partitions is an option as things stand now. What do you have to lose anyways?

EDIT: Have you tried to boot Windows to it's 'Last known good config'?
September 9, 2011 2:13:59 PM

Actually, just because it works in safe mode, doesn't rule out a power issue, it simply could mean the system is not getting stressed enough that the issue surfaces. Although the fact that he plays games has got me baffled. But it is just WoW, which is not really a graphic intense game, so... perplexing nonetheless, but from my experience, definitely sounds like power issue (I've had enough of them :S)
September 9, 2011 2:59:23 PM

Obviously power has to be the first suspect, but he's running his notebook directly from the wall socket once he thought that his battery was to be blamed.

The power supply in Japan can't be that bad? I'm guessing even without Fukushima, they are doing plenty alright :) 
September 9, 2011 3:08:01 PM

Yes, but my point is the brick that plugs into the wall could be bad, or it may even be a short in the power cord. I would try plugging it in then knocking the cord around a little and see if it restarts.
September 9, 2011 6:30:19 PM

calguyhunk said:
As for the RAM voltages, quite the opposite. You should actually get into the bios and set everything on default & try to boot from there to see if the problem is resolved.

I don't know why it doesn't act up while you're playing games, but everything else points towards software failure (you hope that's the case, as it'll be free and painless :) ). Actually, it has to be, since it works alright in safe mode. That is indeed the case, right?

If so, I think backing up your data externally and then re-installing after formatting all the partitions is an option as things stand now. What do you have to lose anyways?

EDIT: Have you tried to boot Windows to it's 'Last known good config'?


Yes I have already done the boot and the last know good config and continues the rebooting.

So How I get into the bios and set everything to default?????


Now its for MundoDragon:

You have said that :

Yes, but my point is the brick that plugs into the wall could be bad

So Its there something to test the brick or I have simply to buy another and try???

September 9, 2011 6:36:47 PM

Yes, a voltage meter, but you would have to know the specs of the power supply and it can be complicated, which is why I suggested taking it in for service and have the professionals do it. They may not even charge you to test it, if they are going to be the ones to fix/replace it if it is bad.

But first, I would try my suggestion above in checking for a short in the cord by wiggling it around while the laptop is on and see if it loses power. Not the safest thing against data corruption, but better than where you stand now.

EDIT: As for getting in the BIOS, it varies depending on the BIOS. I would suggest looking in your documentation or looking it up online. It is usually either the DEL or the F1 key during POST, but it could vary. Once in there, look for an option label 'Set BIOS to optimal settings' or something similiar, select it, then save and exit. Computer will then boot up normally. Don't touch ANYTHING else in the BIOS unless you specifically know what it does.
September 9, 2011 8:29:16 PM

I have read a thing that I think its important, here is:

http://www.ehow.com/how_8371044_measure-computers-inter...

The words that caught my attention in that link was that sentence:

BIOS is a very low-resource program so temperature readings in BIOS will be lower than they would be when running a high-demand program such as a video game or editing software.

Since that my computer can work perfectly when he are running a game I think its a good information.
September 9, 2011 8:35:18 PM

^ Absolutely. That's why you need to take the temps from a software program like Core-Temp/HW Monitor/Everest etc.

What are your temps anyways? You never did mention that.
September 9, 2011 8:36:09 PM

Okay, so now you think it is a overheating problem? You lost me on that last post. It very well could be a cooling issue, but I ruled it out considering I didn't see you mention anything about extreme heat. If the laptop is getting hot, then that is most likely the issue. In the case that it is, I would look into getting a cooling pad for it. It is a pad that you set the laptop on that helps keep it cool during extensive use.
September 9, 2011 9:18:52 PM

How I put an print screen from the temperatures of everest????
Like copy and paste the image to here to show you my temp.

Ah and plz give me a response to a commentary that I have discover while downloading system cleaner is that true? Here is the comment:

I hope nobody really uses these registry cleaners. Registry cleaners often cause more damage to your Windows system than anything. They render a lot of programs inoperable and can render your operating system useless. Never download or use anything that claims it can "fix it all in one click."
September 10, 2011 6:27:40 AM

Forget 'bout system cleaners. Use 'CCleaner' if you have to. Maybe 'Advanced System Care Free', but ABSOLUTELY nothing stronger.

As I've laid out already, if nothing else works, try reinstalling Windows and if the problem still persists, take it to a reputable service center.
Sasuke22 said:
How I put an print screen from the temperatures of everest????
Like copy and paste the image to here to show you my temp.
Get the image on your screen. Press "PRT/SCR" (print screen). The image will automatically be recorded and copied. You won't see anything onscreen.

Now, in the search box, type "Paint". Open the program & press the "Paste" icon on the top left corner (not the downward arrow).

Re-size the image if you know how to , else just save the pic in jpeg format to a location of your choice (click on the dark blue icon above "paste").

Now, for uploading images, go to "tinypic.com", click on "Browse", go to the location of the stored photo & click on "upload".

Once that is done, wait and copy the [img/] format address labelled "for forums etc." & paste that on this forum.

Do that, but really, what are the temps (on Core Temp maybe)?
September 10, 2011 9:56:55 AM



Here is, I dont know what is the GMCH2, thats the value more ellevated.
Ok hope this helps :( 
September 10, 2011 10:56:48 AM

Those temps are really not the problem. Not by a long way.

And GMCH2 is the Video chipset. Shouldn't be at 60, but shouldn't be a problem at those levels either.

Anyways, so here's the deal -

1. Get into the BIOS, change everything to default and see if that works.

2. Try disabling "Auto Restart" from Computer>System Properties>Advanced System settings>Startup and Recovery Settings(at the bottom)>In the Startup and Recovery window, uncheck the box next to "Automatically restart".

Click on Apply/OK and get outta there.

3. If that doesn't work, then reinstall your OS, 'coz it might just be a software issue, seeing as it doesn't play up in safe mode.

If even that doesn't work, 2 words - Service center.
September 10, 2011 1:29:47 PM

Ok I will try that, and see if it works.
September 10, 2011 2:26:20 PM

I have clicked F2 to open setup utility I think its there and in the last option I put to default I think its that no???
September 10, 2011 2:45:07 PM

I really don't know how your bios is set up, Sasuke. Different set ups for different manufacturers.

Could you please elaborate exactly what all you see on screen & navigating through what got you to the "default" option that you're talking 'bout?

I wanna be absolutely sure before I advise you to make changes in the BIOS.

EDIT: If you can, then posting a photo will be the best case scenario.
September 10, 2011 10:02:57 PM

Ok I will take a photo of what I see and I will post here.
September 11, 2011 11:16:21 AM

I couldnt take a photo, sorry :/ 

but here is +- what I see:


Insyde H20 Setup Utility


Main | Advanced | Display | Security | Boot | Exit















And in the option exit I have 4 other sub options:

- Exit discarding changes
- Load Setup Defaults
- Discard changes
- Save changes


And I think its to load the option: Load Setup Defaults, but I dont know the absolute sure if the bios is this screen so help plz.


If dont recognize by this informations you can do questions about the screen I see.
September 11, 2011 2:03:20 PM

Yes, from within the exit menu, select "Load Setup Defaults". Save and exit. (Probably F10 or something).

If it still doesn't work, re-installing the OS might be the last option before taking it to a service center.
September 11, 2011 8:02:12 PM

I have select load setup defaults in bios , save and exit and no result continues rebooting.

Remember that I have said that I have format my computer? I have done what is written in this site:

http://howtoformatacomputer.com/format-windows-7

is this the same of formatting a computer????
September 12, 2011 4:54:10 AM

This will format just the partition that Windows will be installed on. You can format every drive or just the required drive according to your wish.

I recommend formatting every single partition if you've backed up your data already.
September 12, 2011 8:41:02 AM

And How I can format every single partition??

In this step of the site that I learn to format windows, in my last comment its a step that say's:

• If you want to format the partition, go to Drive options
and format the partition where you want to install windows 7. Again, do this only if you have backed up your documents/files!
click format and then yes.

So what I have to do its choose all the partitions and format???
September 13, 2011 6:59:06 AM

You can format from within the BIOS, or during windows installation. Just choose to install Windows on the drive you wanna format and choose "format this partition" from drive options/additional options.

Then cancel installation on that particular partition and choose another one. Continue to do that till all the partitions are formatted using default options.
September 13, 2011 10:10:12 AM

Ok I will try that.
September 13, 2011 7:15:57 PM

I have discover something that could be very important.

Today I was playing a online game just to be absolutely shure that when Im playing a game the computer dont reboot.

I start play the game login menu password and user and there we go.

So the game consistes in gather a team, the computer chooses 4 members of the game and they are going to play with you.

When you have gathered the team , all of your team have to choise a caracter to play. you have around 80 sec. to choose.

And stars here a strange thing. When you are choising your caracter if you loose the net or you simply shut down the computer, the team is disbanded and the game dont start the others four members are disbanded and they have to find other teammates. The part of choising caracters its like a waiting menu, so what Im saying its when you are choising the caracters you are not really playing the game, just in a temporary menu. ( NOTE: In login menu and in the temporary menu, when you choose the caracters, THE COMPUTER CAN REBOOT because have already happen)( the computer DONT reboot just when you are really playing, when the 80 sec. of choising caracters have reach the limit and so the game can starts.)

So I was choising my caracter, probably 20/10 seg. to the limit of choising caracters time end and the computer reboots.

I was thinking well I have to read the game one more time to login in the game and do another team and start the game, but strangely when I log in the game was saying that the game is already occuring and you can reconect.
(NOTE: In the caracters choise menu if you disconnect or computer shut down you have to run the game and find another team but if you are in the game, if you have choise your team and your team have already enter the game and in the midle of the game the computer shut downs or you get disconnected you can reconnect instead of gather a team again.).

So what have happens to me is that I was in the I was choising my caracter, probably 20/10 seg. to the limit of choising caracters time end and the computer reboots.
I was thinking well I have to read the game one more time to login in the game and do another team and start the game, but strangely when I log in the game was saying that the game is already occuring and you can reconect.

So its kind of strange because if the game is saying me to reconnect the computer has dont really shut down, I dont know how to say this but it's like the computer have shut down the screen and continues work normally but whitout the screen. But it was a reboot like the others, but with this I think that my reboots are not normally.


And one more thing, I have discover that when the computer reboots the screen dont pass do black immediatly.

It seems that the screen takes a litle seconds to be completely black, and I can see a few of the things I was doing on computer, after shut downs. Maybe the seconds that the computer spent after restarts its to put the screen absolutely black, I really dont know thats why I need your help. (NOTE: Iam gonna describe better the reboot: the computer shut downs and after 2 or 5 sec. the computer restarts.)

HOPE THIS HEPS :??: 
September 14, 2011 7:16:52 AM

Way too complicated to solve over forum correspondence. Sounds like it could be malware as well. If a total and complete re-format and re-install doesn't help, take it to a reputable service center. It might cost you a little money, but you'll in all probability get back your peace of mind from a malfunctioning computer.
September 14, 2011 1:04:33 PM

Ok I will reformat and reinstall but how I do this ?, is like you have said in the last post?????

I was looking for a way to set to manufacturing settings pressing the 0 key and power button but seems that doesnt work for me.
September 14, 2011 7:54:45 PM

Sasuke22 said:
Ok I will reformat and reinstall but how I do this ?, is like you have said in the last post?????
Yes.
Sasuke22 said:
I was looking for a way to set to manufacturing settings pressing the 0 key and power button but seems that doesnt work for me.
You've already set the BIOS settings to default like you mentioned in a previous post.
September 14, 2011 7:58:43 PM

But it's not like this video I have seen he does a different thing and with a computer similar to mine:

http://www.youtube.com/watch?v=YOfM1dcfzko

If you can give your email it would be better since that you are now the only posting on my threath.
!