avast! 4 Professional antivirus, anti-spyware & anti-rootkit for Windows
The professional solution to great protection
avast! 4 Professional Edition represents the best antivirus protection available and can be downloaded and used free of charge for a 60-day trial period. At the end of the trial period, a license key must be purchased, which will be valid for a further 1, 2, or 3 years. 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.