Can someone give me a step by step instruction for fixing a computer with a virus? I have a Windows XP cd, and am going to try reinstalling windows.

are you sure you need to re-install windows? when was the last time that's be done? (if it's 3+ years, i'd do the re-install. if not, don't bother). Do you have all the appropriate drivers or ot...

Its an older PC with no discs. It was given to my brother.

ok then format it. make sure about the network driver though, for sure.