Malwarebytes Anti-Malware

It is finally here. The program you have been waiting for for months.

Malwarebytes' Anti-Malware (MBAM) public beta 1 (build 054)
Microsoft Internet Explorer 5.5 or higher.
250MHZ processor with at least 64mb of RAM.
Windows 2000, NT, XP, or Vista.
3MB of available free space on hard drive.
Internet access for updating definitions.

http://www.malwarebytes.org/forums/index.php?showtopic=2050
http://www.malwarebytes.org/beta