All-inclusive, comprehensive protection: avast! 4 Professional Edition includes anti-spyware protection, certified by the West Coast Labs Checkmark process, to protect against the latest spyware threats and anti-rootkit detection based on the best-in class GMER technology, built into the scan engine.

Simple to use and fully automated: Automatic incremental updates provide real-time protection of your system, including web surfing. We've made avast! antivirus as simple to use as possible, while allowing full control of your computer's security.

Tried and Trusted: With over 100 million users of avast!, you can rest assured that you are using one of the most tried and trusted antivirus products in Windows security. avast! supports more MS Windows versions (from Windows 95 to Vista 64-bit) than any other anti-malware product.