Protect a PC and clean up the crap on Windows

I recently asked my twitter friends how they protect their Windows XP PC from viruses and clean up all the crap you usually find on Windows machines (I wouldn’t know, I have always used Macs). Here are their answers: freecloud @mbites as well as AVG, use something like Lavasoft and CrapCleaner and   run those every so often. XP is quite clean, strip the addware iusher @mbites I’ve used http://www.nkprods.com/ncleaner/