Ever since I downloaded a particular file off KaZaA about a week ago, I haven't been able to access any system settings whatsoever. Basically, whenever I click on an icon in control panel, it doesn't load, same goes for clicking properties on the drop down menu. This has been really pissing me off as I can't play Diablo in 24-bit colour, but can't play movies in 16 bit colour, and since I can't change it I haven't been able to do a lot of stuff.

I'm looking for a way to solve this manually, by actually finding the file (through DOS or windows) and deleting it. This is because I bought this computer in 00' and ever since then I haven't updated my Vshield, so lots of stuff gets past it.