I have been working with this particular problem for two weeks now. I am running a socket 1366 I7 processor and Windows 7 Ultimate x64; 12 gigs of ram (for running VM)
I have changed motherboards.
I have changed video cards
I have checked my hard drive
I have upgraded bios
I have tried different settings in the bios
I have tried different versions of video drivers
I have changed my SATA slots
I have changed power cables
I have changed SATA cables
I was running Vista 64x earlier with no problems on default settings.
I always did clean installs (I have done 5 now)
After changing the motherboard, re-installing, and accepting the default windows 7 drivers for both the motherboard and video card, I reinstalled everything... and after two days of no down time, I thought we were clear.
Tonight, without warning, it reboots (no blue screen, and I went to Control Panel to shut off the "don't reboot" option).
I couldn't get back in windows booting normally, or in safe mode..... it would either reboot on "please wait", or shortly after typing in my password.
I went back to the last successful configuration. I have removed my usb keyboard, and am using PS2. I am working now.
I have removed all references to sleep mode, waking up on lan, USB, etc.
I have looked in the event viewer, and there is nothing that gives me an inkling that anything occurs before Event ID 41.
This last event, I was browsing the internet, had IM on, and a few windows open; no VM.
I am monitoring the heat and power voltage to see if I get any warnings.
The only common denominator between these two motherboards is the same Realtek network card. I have my suspicions here..... my network drives were showing x's (No longer since I have removed the sleep function from the device).
All that is left is the case and power supply. I specifically ordered a PWS with enough power.
I have read several hundred postings on this issue. People 'think' they have a solution, but there is no consistency - other than it happens "randomly".
I even tried the sfc /scannow with no errors.
I seem to remember Vista having issues with sleep functions when it first came out. Possible similarities?
I figure once the big hardware manufacturers start testing their components with Windows 7, they will work directly with Microsoft to document and fix the issue. Otherwise....
This is not a solution obviously, just a list of the types of things I have tried. I will keep posting the group, if my latest solution (no power settings) work.
I was able to look at the system logs, and saw the following Event ID 6, Source FilterManager entries approx 6 seconds before the system shutdown: File System Filter 'SymEFA' (6.0, 2009-08-27T21:27:03.000000000Z) has successfully loaded and registered with Filter Manager. File System Filter 'FileInfo' (6.1, 2009-07-13T18:34:25.000000000Z) has successfully loaded and registered with Filter Manager. File System Filter 'eeCtrl' (6.0, 2009-08-17T18:05:31.000000000Z) has successfully loaded and registered with Filter Manager. SOMETIMES File System Filter 'BHDrvx64' (6.1, 2009-09-11T03:06:53.000000000Z) has successfully loaded and registered with Filter Manager.
SymEFA and BHDrvx64 are Symantec's (Norton Anti-Virus)... so I will see what they have to say.