Avast! 4 Professional Edition is a collection of award winning, high-end technologies that work in perfect synergy, having one common goal: to protect your system and valuable data against computer viruses. It represents a best-in-class solution for any Windows-based workstation. This page demonstrates its most important features and provides links to further resources.



* fixed a vulnerability in TAR unpacker (special thanks to ¡§Sowhat¡¨ of Nevis Labs)

* improvements in various unpackers (winexec, installer, CAB, NTFS Streams

* boot-time scanner now functional even with USB keyboards

* speed improvements in the Outlook plugin (Windows XP+)

* Web Shield: compatibility improvements

* Internet Mail provider: improvements on Windows Vista

* CAB unpacker now working in boot-time scan


* RAR unpacker modified so that it is now more tolerant to certain corrupted archives

* Professional Edition: scheduled scan progress icon now accessible even in Windows Vista

* Windows 9x/ME: fix in the Mail Protection Wizard

* fixed a bug in the scan area selection dialog in Windows NT/2000

optimizations in the updater

* removed mail heuristics false alarm