Good vulnerability scan site

[GTaylor]

And yes, it's free. Scans your PC for vulnerabilities in your system and software (On mine it told me I had an unsecure version of Adobe and Flash).

http://secunia.com/software_inspector/

[Hostile]

Thank you. I love good tips like that.

[the kid 05]

this is the best free anti-virus program i had ever found for my pc

http://www.lavasoft.de/software/adaware/