avast! 4 Professional Edition is a collection of high-end technologies that work in perfect synergy, having one common goal: to give you the top grade protection against computer viruses. It represents an ideal solution for any Windows-based workstation.
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 and Vista platforms.

Changes in Version 4.7.1029; July 28, 2007:
* infrastructure changes in the scanning engine bringing higher detection rates
* fixed a bug that was sometimes causing crash of the avast screensaver during its initialization
* improved handling of corrupted files in the SIS and CAB unpackers
* Standard Shield: fixed a minor memory leak in the Vista (and Vista only) driver
* Standard Shield: improved the "move to chest" command in Vista
* Standard Shield: the default scan exceptions are no valid for read/write access only (no execute)
* added more "installer" unpackers
* added more Win32 executable unpackers (Enigma etc.)
* for NTLM proxy authorization (via ISA Server) it is now possible to specify the account under which the avast service will perform the update
* added Arabic language pack