Download:avast! 4 Professional Edition represents the best antivirus protection
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. Simply install and forget.
All-inclusive, comprehensive protection avast! 4 Professional Edition includes ANTI-SPYWARE protection, certified by the West Coast Labs Checkmark process, to protect against the latest spyware threats and ANTI-ROOTKIT DETECTION based on the best-in class GMER technology, built in to the scan engine. No additional purchase is required.
* solved incompatibility of the avast self protection module and the System Restore feature (Windows XP/Vista)
* solved keyboard/mouse lags in some games (e.g. World of Warcraft)
* "Quick" scan now quick again (in the previous version, it was usually slower than "Normal" scan)
* fixed slow resuming from hibernation (on certain systems)
* improved stability of aswSP.sys kernel driver
* fixed deleting of infected files in some nested archives
* shell extension: under Windows Vista, shortcut targets are now correctly scanned
* boot-time scanner now correctly displays warning messages about corrupted archives
* improved scanning speed in the Simple user interface
* improved handling of scan exceptions
* self protection: improved detection of changes in the INI file
* start of the "avast! Mail Scanner" service should now be fast again
* fixed a problem with avast being installed in a directory with name containing non-Latin characters
* fixed entering of the license key (didn't work in certain configurations)
* improved detection/healing of MBR rootkits
* avast can now correctly handle the case when the INI file is missing/corrupted
* the "Disable startup rootkit scan" option on the Troubleshooting page now effective
* P2P Shield: added support for Azureus Vuze and Qtrax
* taskbar messages from Internet Mail should now correctly handle most common character encodings
* fixed problems with the boot-time scanner on FAT[32] partitions
* small improvements in some unpackers (WinExec, RAR, CHM)
* fixed the message announcing the license key going to expire soon
* on 64-bit Windows, avast now detects both 32-bit and 64-bit version of the WHS connector
* the avast Home / Pro Edition comparison window is now correctly displayed even under Windows 9x