Here is a Windows Defender. It will scan your computer daily, and check for Viruses, Trojan's, Spyware, and othe crap that people put on the internet.
http://www.microsoft.com/athome/security/spyware/software/default.mspx
I'll be sure to update this topic everytime a new version of this software comes out.
yo i like the sign its cool. 😀