What is the best antivirus software for a PC?
Microsoft Security Essentials.
Norton is great.
WebRoot. It has realtime online scanning and security. Recommended to me by several technology gurus.
Trend Micro Antivirus.Whatever you do, just NOT NORTON!!!
AVG is smooth and good
Dude PC stands for Piece of Crap
I recommend you try Unthreat Antivirus, it's really easy to use and it's free!