its gone all weird!

[bilko]

Hi guys
recently loaded this free nemo disk for the kids against my better judgement. The game was fine untill i tried to close it when it started perfoming illegal opperations. I have since uninstalled the disk and now all my toolbar on the right is fuzzy with tiny icons, also the clarity of the screen seems to have got a lot worse with the occcasional lines dashing along the screen. Ive tried adjusting everything in display properties but i can't seem to get the computer back to the way it was. Everything just looks really naff and slightly fuzzy now.
Any advice would be gladly appreciated.
Thanks