Yes, the drivers come bundled with XP, but you can update to the latest Via's without problems, I just did it to mine (fresh install of xppro, updates, then latest 4in1's as I figured that the drivers xp had were a lot older, plus the latest 4in1's had some features I wanted. To date everything is flying smooth (knock on wood)

That's why I suggested he reload the drivers. From the sounds of it, he's got a fairly fresh load, why not just wipe and reload, load the updates and leave it? (or yes, do a system restore

)
As for the northbridge fan, when I removed mine (fan was making noise) I took the hs off too, found that Epox had just thrown some paste at it--didn't even cover the whole area, and was a thick blob to boot--so I cleaned it up, re-applied the thermal paste, and installed a new fan. Unless he's seriously oc'n, he should have been alright for a short time. Hmmm, that's a pretty serious oc, damn dude, you may be boo-foo'd on that mobo
