The professional solution to great protection
avast! 4 Professional Edition represents the best antivirus protection available. avast! 4 Professional Edition comes with anti-spyware, anti-rootkit and strong self-protection built-in. It is designed to protect your valuable data and programs, as well as keep itself up-to-date and has the kind of built-in features that many vendors charge for additionally, or don't include at all. Simply install and forget.

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 in to the scan engine. No additional purchase is required.

Simple to use and automated Just install and go. 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 security.

Tried and Trusted With over 50 million users of avast!, you can rest assured that you are using one of the most tried and trusted products in Windows security. We support more Windows versions (from Windows 95 to Vista 64 Bit) than any other anti-malware product. No matter what system you have, at home or on a corporate network, avast! has it covered.