Windows 7 - PC Keeps Shutting Down!

I am having an issue with windows 7 64bit. Every time i am done using the pc, it will randomly shut down, at different times. I have no clue what the issue is. I do not have a heat problem , nor PSU problem. When I am on the computer, whether it is 20 mins or 4 hours, no problems, but when I am done using it, and nothing is being used, it will just shutdown. I have no clue as to what is causing it. Any help would be appreciated.

PC Specs:
Abit NF-M2S Motherboard
4Gb GSkil DDR2 800MHZ Ram
NVIDIA 9600GT Video Card 512MB
400W PSU
BOSE 7.1 HD Sound
AMD Dual Core 4600+ CPU

Are you running the Release Candidate of Windows 7? If so, as part of the expiration process, your computer will continue to shutdown until your purchase a full version of Windows 7 or reinstall your previous OS: It's time to upgrade from the Windows 7 Release Candidate.

No, I am using Windows 7 64Bit Home that I purchased in October 2009.

I had this problem a while ago with a laptop and mine was an over-heating issue. Have you tried changing your Power Options? In Power Options you can adjust how long your computer waits before hibernating, or prevent it from turning itself off altogether. Sleep and hibernation: frequently asked questions

Cassandra
Microsoft Windows Outreach

just to throw another stick in the mix, upgraded my system about 3 months ago Gigabyte H55MS2H mobo with i3 540 random shutdowns started straight away and i assumed the motherboard, when i spoke to the supplier they suggested it was the psu which was a 600w thermaltake from my old system and had served me well. so i swaped out the power supply with a new 550 thermaltake from another system. the 550 in my system worked fine and solved the problem, the odd thing was that the 600 in the other system also worked fine. interesting? well as i couldnt keep the 550, the 600 went back in and th problem continued, until one day it stoped, iv racked my brain trying to retrace what i could have dont, the only things that stand out are updating the motherboard drivers, replacing the backround picture and updating the bluetooth drivers. now the painful thing is i have done a clean install because i wasnt happy with the amount of crap on there and now my darling problem is back, i have upgraded the drivers and still no fix. i really pains me because i now know that it is a software problem i just dont know how to fix it.

Can I assume you arent overclocking, and not running a RAID?

I am still thinking hware tbh. How many external unpowered usb devices do you have?

just usb bluetooth dongle, mouse, everything else is powered usb.

2x 1tb external hds
1x printer
1x thermaltake case (lcd screen)

doesnt make any sense that with diff psu it works fine other then that the psu is faulty but as i said for the past month previous to clean install of windows the problem had fixed itself.

go figure....

Ok now I have no idea why my windows7 keeps shutting down after running for about 30 minutes.

I ran a memory test and it said one of my memory sticks is bad. So I replaced and retested the memory. Memory tests fine now, but windows 7 Retail version keeps shutting down.

I can dual boot into Linux with the same hardware and it runs fine.

I also have troubles with Windows 7 not connecting to the internet at times, but Linux seems to have no troubles, again with the same hardware.

If the system were overheating or failing, then Linux too should be acting up.

Iam running Windows 7 on a Acer Laptop which dual boots into Windows or Linux. I have tried running programs in a compatibility mode, but with no luck.

I am currently running a memory test that last for hours from a boot disk and the system runs fine-----no shut down like Windows 7.

Like I said, Linux can run all day with no problems. It appears that Windows 7 does an update and next thing I know is that it does weird things like I have mentioned.

Does Windows 7 have bugs? What's the story here?

I am running the 32 bit version of Windows 7 because the 64 bit seems to still have compatibility issues and not enough 64 bit support.

I do own both versions of Windows 7---32 and 64 bit, but neither one is any good if it cannot run long enough.

The system ran fine at the first install. So I believe there might be a driver problem that was updated from Microsoft.

Oh yes, I have adjusted the power settings and others to keep the computer from shutting down from some setting within Windows 7.

Please help if you have an answer to this one!

thanks

OK lets get serious with it

It is either memory or a driver. These two tests will tell you which

Please run these two tests to verify your memory and find which driver is causing the problem.


1-Memtest.

*Download a copy of Memtest86 and burn the ISO to a CD using Iso Recorder or another ISO burning program. Memtest86+ - Advanced Memory Diagnostic Tool

*Boot from the CD, and leave it running for at least 5 or 6 passes.

Just remember, any time Memtest reports errors, it can be either bad RAM or a bad motherboard slot.

Test the sticks individually, and if you find a good one, test it in all slots.

RAM - Test with Memtest86+



2-Driver verifier

Driver Verifier - Enable and Disable

my wife has a laptop with windows 7 which kept shutting down. she sent it under warranty away to a repairer who fixed the fan but when she brought it home it continued to shut down unexpectedly

i had a fiddle with it and fixed the problem by doing three things

1. i took the battery out and left it running on adaptor power only
2. her options under control panel in power options where set to service instead of balanced(recommended)/power saver/performance which means the repairer forgot to change it back when they fixed it
3. not many people know about this next one...when i asked her what was the last program/app she loaded on the computer she couldnt tell me but then i realised that when she wanted me to fix something last time i used it i set up a screensaver for her..so it clicked...i turned off the screensaver that i loaded and went back to a more stable microsoft one...bubbles i think. its now completely fixed!

Hope this helps