Alrightey.. my problem seems to be the same as Janflata's but I didn't actually tweak anything. I'm using windows xp and while I was listening to my music in winamp kept crashing because of the milkdrop visualization plug-in. So I searched milkdrop in Google desktop got to it but didn't delete it or open it, didn't do anything. After that I accessed settings in winamp stopped milkdrop and uninstalled it. Now all my .dll icons have a uTorrent icon. Is there any way to change the icons back?

Have you tried changing the file associations?

Thanks for answering but it's way too late now I reinstalled windows.