I posted the results of a Who Crahed report above.....here are 2 below. once is from December and the other is from just yesterday.
On Sat 1/28/2012 10:33:01 PM GMT your computer crashed crash dump file: C:\Windows\Minidump\012812-9001-01.dmp This was probably caused by the following module: watchdog.sys (watchdog+0xA577) Bugcheck code: 0x117 (0xFFFFFA800CB674E0, 0xFFFFF8800F9D69C8, 0x0, 0x0) Error: VIDEO_TDR_TIMEOUT_DETECTED file path: C:\Windows\system32\drivers\watchdog.sys product: Microsoft® Windows® Operating System company: Microsoft Corporation description: Watchdog Driver Bug check description: This indicates that the display driver failed to respond in a timely fashion. The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time. On Sat 12/31/2011 2:00:43 AM GMT your computer crashed crash dump file: C:\Windows\Minidump\123011-8127-01.dmp This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0xC3BAE4) Bugcheck code: 0x116 (0xFFFFFA801267A010, 0xFFFFF8801004EAE4, 0xFFFFFFFFC000009A, 0x4) Error: VIDEO_TDR_ERROR file path: C:\Windows\system32\drivers\nvlddmkm.sys product: NVIDIA Windows Kernel Mode Driver, Version 285.62 company: NVIDIA Corporation description: NVIDIA Windows Kernel Mode Driver, Version 285.62 Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed. A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 285.62 , NVIDIA Corporation). Google query: nvlddmkm.sys NVIDIA Corporation VIDEO_TDR_ERROR
I have NOT overclocked anything on this PC - everything is set as it was when I first booted up - no tweaks to speed at all.