[Jaysun]

There's an excellent free anti-virus system that I use. It can be found at the link below. I didn't think that I had anything on my PC but it found 34! Just go to the link below. Scroll to the bottom and click "Next" and you'll be on your way.

http://free.grisoft.com/freeweb.php/doc/2/

[Stoat]

Ping! Hopefully our friend backhoe might be willing to post his legendary list of security-related applications in this thread :-)