avast!是一款来自捷克的反病毒软件,有全模块化的架构,它的引擎核心可与许多的客户端程序或 Plungin 配合.这软件可以侦测出大量的 Windows 9X/Me 或 Windows NT/XP/2000 环境下的已知病毒,甚至对那些无法直接侦测出的未知或变形病毒也可以.正确的使用防毒程序或数据保全措施(如备份),可以再计算机受到危害时将损失减到最 低.下载:avast! Professional Edition v4.7.981

Changes in Version 4.7.981, April 14, 2007:
- fixed extra-long duration of the boot-time scan under Windows Vista
- WebShield: improved compatibility with Windows Vista
- WebShield: better support for HTTP method CONNECT in upstream proxy scenarios
- fixed a minor memory leak in aswrdr.sys
- auto-updates now use much less CPU resources (should not interfere with other CPU-intensive programs running on the computer, e.g. games)
- added a new unpacker: "installers"; useful especially for detection of malware droppers
- Outlook/Exchange provider: improved compatibility with Outlook 2007
- boot-time scanner: fix for the case when there's the /NOGUIBOOT option in boot.ini
- fixed a problem in Standard Shield under Windows Vista related to saving of Word 2007 documents on FAT partitions
- email alerts now use correct formatting even for non-Latin characters
- fixed a rare problem in Standard Shield related to handling of disk volumes mounted to NTFS directories
- further enhancements in executable unpackers
- fixed a bug in ZOO unpacker (special thanks to Jean-SЁ¦bastien Guay-Leroux)
- task scheduler: it's now possible to specify which days of week the task should run
- command-line scanner (ashCmd.exe) now supports a couple of more command-line options, mostly related to handling of infected files[/li]
- mail scanner: improved deleting of entire emails (virus embedded in email body)
- fixed opening of the sounds settings dialog under certain operating systems
- avast! screensaver now available even under Windows Vista 64-bit
- better detection of corrupted/modified VPS file
- WebShield: other minor fixes
- added Macedonian, Croatian and Portuguese (not Brazil) language packs