I found this thread while Googling the same symptoms.
Windows 7 Home Premium, I think the chip is an i7-2600 @ 3.0 Ghz (I'll try to confirm that if I can get computer to not crash seconds after startup) 8 G DDR3 RAM, 500G SSD, and 1 TB HD. Asus P8P67LE mobo, Rev3.0. I use Bitdefender Free.
No new installations, however I noticed that a Windows update installed automatically last night April 22, 2014 around 5. (which may sync well with imijj's prob)
Suspecting that the Windows Update was the source of the prob, I tried to do a System Restore. I noticed that oddly I only had one restore point, and it was the one created by the windows update just prior to its installation. When I tried to do the System Restore, it notified me on restart that the restore had failed because a file could not be accessed (I don't think it named the file), it suggested that I try to disable my AV, then try again. I did that, but the System Restore still failed.
I followed DSK's and Roodo's advice and booted in Safe Mode as Administrator with Command Prompt. I ran the sfc /scannow and it returned "Verification 100% complete. Windows Resource Protection did not find any integrity violations".
This computer was my first machine with both an SSD and a regular HD, and it's also my first Windows 7 experience, so I pretty much alternate between blaming every single glitch I experience on one of these two factors.
I just found my installation disk in an old box in my closet, Sweet. I've never done a repair or fresh install on a machine with two harddrives. I'll wait to hear back from someone in this forum before even attempting that. I may need a bit of help if it comes to that point.