I saw this yesterday selling for $14.99 for a lifetime license so hopefully I will win one. They also have a free version which is suppose to be good as well.

Key Features

Support for Windows 2000, XP, Vista, and 7 (32-bit and 64-bit).
Light speed quick scanning.
Ability to perform full scans for all drives.
Malwarebytes' Anti-Malware Protection Module.
Database updates released daily.
Quarantine to hold threats and restore them at your convenience.
Ignore list for both the scanner and Protection Module.
Settings to enhance your Malwarebytes' Anti-Malware performance.
A small list of extra utilities to help remove malware manually.
Multi-lingual support.
Works together with other anti-malware utilities.
Command line support for quick scanning.
Context menu integration to scan files on demand.

From Bitsdujour

"Malwarebytes' Anti-Malware monitors every single running process and stops malicious activity before it even starts. The Realtime Protection Module uses advanced heuristic scanning technology to actively monitor your system, keeping it safe and secure. There is even a current threats center that allows you to keep up to date with the latest malware threats!

While the free version includes all of the powerful anti-malware heuristics and algorithms, a registered license unlocks several important features, specifically: real-time protection, scheduled scanning, and scheduled updating."

The realtime protection of the Pro version also includes IP Protection which prevents malicious sites from loading in your browser.