- scanning and virus chest features now accessible even from Windows Safe Mode
- aswSP.sys: solved a minor stability issue (fixed duplicating of protected handles)
- Pro AV / IS: solved file enumeration problem on FAT32 partitions
- enhanced compatibility with various Winsock LSPs
- various improvements in the avast! sandbox
- improved cleaning of file infecting viruses
- added compatibility with screen readers; avast! should now be reasonably accessible to visually impaired users
- system files imported to the virus chest after upgrade from v4.8 are now removed
- IS firewall: solved a problem related to VPN connections (Windows XP)
- IS firewall: solved a problem related to Xbox360 media sharing
- IS firewall: solved a potential BSOD condition when changing logical drive mappings
- IS firewall: solved a potential crash when saving the packet rules
- IS firewall: fixes for Internet Connection Sharing
- IS firewall: Windows 2000 compatibility
- IS firewall: solved a compatibility problem with Logitech Desktop Manager
- Pro AV / IS: solved a compatibility problem with PerfectDisk 11
- Pro AV / IS: ashCmd.exe switch /@ should work again
- Pro AV / IS: solved a compatibility issue with Acronis True Image
- various fixes in the Outlook antispam add-in
- fixes in ashUpd.exe
- minor improvements in the installer, especially when upgrading from avast v4.8
- avast! Screen saver can be now configured via the screensaver properties dialog
- minor fixes in the GUI
- added Dutch, Portuguese (Portugal), Norwegian, Finnish, Slovenian, Turkish and Vietnamese language packs