Please run Memtest on your Ram
And confirm all your Device Drivers are up to date

I haven't tested the drivers yet, but I'm running the memtest at the moment on the computer (I'm using my other computer to type this). I ran a memtest86 (not 86+) last week and it came up with no errors... but this one has found 1817600 errors....I was worried just one would come up! I take it this isn't a good sign? And I'm guessing my RAM probably needs replacing... I let it run for 10 passes as it was still climbing in number at 7. I have a couple of things to do, so I'll see if there are any drivers that need updating shortly.

Edit: Call me dense, but I'm not sure what drivers I have from that list in the topic you linked... I have an NEC Powermate computer and I know there's some Realtek, SiS... and I have no idea what else.