These are good (free) antivirus programs: AVG Antivirus --> http://www.grisoft.com Avast --> http://www.avast.com
Yeh why not just look at my guide, thats why its there .. http://forums.afterdawn.com/thread_view.cfm/292257 AVG and Avast are good enough, if you need a better AV then go for AVG pro. Follow the guide and you'll have a secure comp