Malwarebytes Anti-Malware 1.42
Detect and quickly remove malicious threats to your computer.
Price : Free; paid upgrade available $24.95 to buy
Operating system : Windows 2000/XP/2003/Vista/Server 2008/7

Publisher's description :
Malwarebytes' Anti-Malware is a high performance anti-malware application that thoroughly removes even the most advanced malware and spyware. With one of the fastest, most effective quick scans and malware removal capabilities on the market, this program is the perfect addition to your PC's defenses. The full version of the product includes a number of key features, including the ability to schedule updates and scans and most importantly, a real-time malware protection module that blocks malicious processes before they even start.
What's new in this version :
Version 1.42 :
(FIXED) Minor issue during reboot after malware cleanup.
(FIXED) Various errors during scan.
(FIXED) Improved multiple heuristics.
(FIXED) Minor issue while removing items from ignore list.
(ADDED) Internet Explorer version included in scan logs.
(ADDED) Protection logs now show on Logs tab.
(ADDED) Ability to ignore blocked IP addresses permanently.
(ADDED) 64-bit compatibility for context menu.