Malwarebytes’ Anti-Malware

Malwarebytes’ Anti-Malware is a anti-malware program that can quickly detect, destroy, and block malicious software. This is very easy to use and simple tool. There are some features like real time scan which are only available to paid version of this program. This is very light software. Quick scan and full scan features are available with free version.
One of the best anti-malware program I have used.

More information :-

http://www.malwarebytes.org/