Ok, I just uninstalled all nvidia drivers.
Restarted computer, then got 'Blue screen of death'
Selected 'restore to last known good configuration' (or something like that)
Computer
seems to be fine, apart from when I scroll down in FF/IE it lags.
I'll re-install drivers now, thanks for the site Mike.
Edit: Installed all drivers again. Tried the game, still got dodgy black lines
Don't know what the problem could be?