Avast 4 Professional Edition is a complete ICSA & Checkmark certified antivirus, Checkmark certified anti-spyware & anti-rootkit software package for corporate and advanced home use. Avast Professional Edition includes an on demand scanner with two user interfaces, a skinnable simple interface: just select what you want to scan and in which way and press the play button, an enhanced user interface: Outlook like UI allows users to set any feature of Avast, prepare and run tasks, store and check task results, on access scanner: special providers to protect: most available e-mail clients, instant messaging: ICQ or Miranda, network traffic: lightweight firewall, P2P protection for Kazaa, BitTorrent, Web shield: all HTTP traffic, script blocker. avast Professional Edition is available in 32 languages. Small, true incremental, updates are downloaded and installed automatically.

Minimum Requirements:
For a computer running Windows® 95/98/Me:
486 Processor, 32MB RAM and 100MB of free hard disk space.

For a computer running Windows® NT® 4.0:
486 Processor, 24MB RAM and 100MB of free hard disk space and Service Pack 3 (or higher) installed

For a computer running Windows® 2000/XP® Workstation (Not Server):
Pentium class Processor, 64MB RAM (128MB recommended) and 100MB of free hard disk space

For a computer running Windows® XP® 64-bit Edition:
An AMD Athlon64, Opteron or Intel EM64T-enabled Pentium 4 / Xeon processor, 128MB RAM (256MB recommended) and 100MB of free hard disk space

For a computer running Windows® Vista:
Pentium 4 processor, 512MB RAM and 100MB of free hard disk space

The program itself requires about 60MB of hard disk space; the remainder of the recommended space is reserved for the virus recovery database file and its index (VRDB, also known as the "integrity database" from the previous version).

A functional MS Internet Explorer 4 or higher is required for the program to work.

This product cannot be installed on a server operating system (Windows NT/2000/2003/2008 Server families).

Note: The operating systems Windows 95/98/Me/NT4 will be supported until the end of 2009.