BSOD after several minutes of start up. NTOSKRNL.exe+7cc40

#1
I have been using my computer normally for several month, but out of nowhere, today it starts to randomly crash and BSOD.

Symptoms: A few minutes after boot, applications would randomly crash, then after a bunch crashes at once, windows would freeze up for a second or two then go into BSOD.

My minidumps suggest that it crashed in address ntoskrnl.exe+7cc40

What could be the cause?

Here are the dumps: http://dl.dropbox.com/u/3085200/dumps/dumps.rar

I tried to do a system restore to the last restore point I had but nothing changed. I did the window's memory diagnostic tool and it reported no problems.

Been running memtest86+ for the last couple hours and so far no issues either.
 


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