PC trouble

My PC has been behaving most erratically since Saturday.

The pattern is simple. It crashes 60-90 minutes after boot up. I don't think I've seen so many blue screens of death (BSODs) before in my life.

I have not installed any software this month; so that's likely not the issue. I have tested the CPU and RAM and they seem to be fine. What's frustrating is that after wasting almost the entire weekend I still don't know the cause of the problem. Motherboard? Power Supply? A miserable SATA cable dying a slow, annoying death? Who knows!

I've got more work coming up at my workplace in the next three weeks and now I have to deal with this headache. So, blogging will be lighter that usual.