Security Scan Tools for your PC

Dont have expensive Antivirus software Installed ,You can still get your PC scanned online for security vulnerabilities. Its a good way to test for spyware, virii, or open ports. Here are a list of sites you can check out for this:

http://hackerwhacker.com/
http://scan.sygatetech.com/
http://www.testmyfirewall.com/
http://www.auditmypc.com/
http://www.iggyz.com/Test.html

PS : Try using a firewall , In this era it is worth the investment