I too used to use p2p file sharing programs like KaZaA and the hassles I had with trojans, spyware & viruses made me NEVER want to go back.
I had to perform an XP repair as I couldn't get online anymore as Malware must have altered my internet settings.
Since doing this, however, while browsing these forums I noticed that VoG posted a link to a Winsock 'fix'.
If I had known this beforehand it would have saved me repairing XP.
Oh well we live and learn!
Finally since giving up P2P around a year ago I have had NO major problems with my PC and I would never go back!
I now buy my DVD's, CD's & PC games onlineto save money like for example click here