PC suddenly doesen't start properly, freeze and reboot issue.

[Vilpac20]

Hello,
Im having an issue with my pc, yesterday I logged off as per normal. Today I tried to turn it on and the first thing I see is a startup Repair (Windows 7 32bit). So I let it run and do its thing, and after a while it gives me a window saying that it was unable to fix anything (Don't Send). And after restart its the same thing, can't go into safe mode or anywhere except start windows normally (which causes a freeze on the logo screen and a reboot 10 seconds after) or Startup Repair. Tried reinstalling windows with a fresh formatted partition. It goes on the second stage of the install (after a normal reboot) and right before it should set the appropriate resolution (or so I believe) freezes for those 10 - 15 seconds and reboots, after that it can't continue at all saying that the installation was interrupted. So basically I don't know what to do at this point. Any help would be appreciated. Thank You
Specs:
CPU: AMD Phenom Quad XII 965 3.4Ghz
Motherboard: Asus m4a78lt-m
Memory: DDR3 1333mhz 2 x 2GB
PSU: Corsair TX650
GPU: GeForce 560 Ti 1GB
HD: Hitachi 500GB Sata

 

[o1die]

Could be a bad ram stick. Try installing windows with just one ram stick, then if it finishes, run memtest on each stick one at a time. If you were overclocking, use just the default settings for awhile.