Motherboard BIOS Corrupted

Well, I have my new pc ( custom ) and it's been running fine for a few days. Until today. I don't know what happened but the screen just became static for a second and windows then shut down. I have windows 7 Home Premium 64-bit. I restarted it, and instead of 6 cores, it showed 5 cores. I used it for another 30 mins, then it happened again. This time, it went into system repair on startup. It worked and I used it, for ANOTHER 30 mins. Then, *sigh* it happened once more. After that, it wouldn't start up at all. The fans were spinning and LED's lit up, but the monitor remained blank. Only after I pressed the RESET button on my motherboard. It was fine, and I thought the problem was gone.

I was wrong. It was fine for a whole 2 hours, but it crashed again. So, what the HECK is wrong with my pc? It burned a hole through my pocket, so don't tell me that it's screwed. Is my BIOS corrupted? ( I dont know what that means, my friend just told me ) IS my CMOS battery faulty? Or could it be someting I downloaded onto my pc? PLease help. :s

PC SPECS
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MOtherbOard= Crosshair Formula IV
Processor= AMD Phenom II
Graphics Card= HD RADEON 6950
Casing= HAF 912
PSU= Coolermaster Cool'n'Quiet 730