I guess I should really have known better but the advice I read around the net seemed to be good...
Anyway, here's a brief list of things :
ASUS M2N-MX SE
AMD Athlon 64 x2 5200+
NVIDIA GeForce 8500 GT (1gb)
Graphics card had artifacts in Battlefield 2, so I downloaded and installed updated drivers (after removing the old ones) in safe mode.
In device manager a little yellow mark next to "network adapters/nvidia nforce networking controller". Scrolling pages was very slow too.
Found some other drivers and installed those, this seemed to fix the problem.
Artifacts weren't gone, so I lowered my graphics settings in-game. Everything seemed fine, however...
When browsing the net would not load pages or my email, but it would be fine on my girlfriend's laptop (connected to the same wireless router).
Deleted cache and cookies, it was fine for MOST pages (banners still have the error - I have another thread about this).
I then used Driver Checker to update my drivers, it installed a Realtek HD driver, and from there my problems started again!
I reinstalled the nvidia drivers and network adapter driver but the yellow exclaimation mark is still there next to "nvidia nforce networking controller #2" and windows is very slow to boot (it used to boot from power on in about 30 seconds, now it takes more than 2 minutes) and has these little messages come up on the blue logoff screen like "playing logoff sound..."
I really don't know where to go from here. I fear if I keep mucking around with stuff I'll just make these problems worse and/or create new ones. Any help much appreciated!