avast! 4 Professional Edition is a complete ICSA certified antivirus software for your company. It obtained VB100% awards in 2002/4 Virus Bulletin comparative reviews.

avast! scans for viruses, worms and Trojans: On Demand - with two User Interfaces, On Access, E-mail, during Boot Time, in File Explorer and Screen Saver. It maintains Virus Chest. Protects E-mail, HTTP, NNTP, ICQ, mIRC, Kazaa etc. True incremental updates based on iAVS technology updates twice a week virus definition file.
avast! Home/Professional now fully supports the 64-bit Windows platform.

Features:
- Antivirus kernel
- Simple User Interface
- Enhanced User Interface
- Resident protection
- Script Blocker (Professional Edition only
- P2P and IM Shields
- Network Shield
- Web Shield
- Automatic updates
- PUSH updates
- Virus Chest
- System integration
- Command-line scanner
- Integrated Virus Cleaner
- Support for 64-bit Windows
- Internationalization

Changes in Version 4.7.844; May 31, 2006:
- improvements in executable packers (most notably, AsProtect unpacker)
- fixed incorrect handling of non-Latin characters in the data storage
- Outlook plugin: now compatible with Windows Vista
- avast! now working correctly under Windows Vista 64-bit builds
- fixed incorrect statistics in sessions of scheduled tasks
- fixed a problem in the creation of silent installation (Professional Edition)
- fixed a subtle bug in the data storage (occuring after deleting an object)
- added Danish language version