Version 4.8.1201
May 16, 2008

* solved incompatibility with System Safety Monitor (SSM)
* improved compatibility of the self defense module with XP SP3 (and its installation)
* minor enhancements in the Web Shield (detection of streaming content)
* minor fixes in the updater

Version 4.8.1195
May 12, 2008

* 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

Download :
avast! 4 Home Edition
avast! 4 Professional Edition

Thanx for the info Bro. I have update manually.

yeah,just installed it,seems suitable for my vista 32-bit,hehhe

Version 4.8.1227

* improvements in some unpackers (WinExec, SFX CAB, LHARC, ZOO)
* check for critical system files is now performed even in the on-access scanner (as a prevention of false positives)
* command line scanner (ashCmd.exe): fixed displaying of directory count
* Windows Vista: during a scan of system drive, duplicate entries are now handled correctly (symlinks)
* Explorer extension process (ashQuick.exe) now ends immediately after aborting a scan
* fixed a bug in SMTP alerts (adding of random characters to the address)
* verification of digital signatures now fixed even for the on-access scanner (Windows Vista and Windows XP x64)
* fixed the setting to disable checking of infected files during on-demand scans
* Enhanced UI: it is no longer possible to delete a default task by using the Delete key
* solved a synchronization problem that could potentially lead even to a hang of an avast component (e.g. the Outlook plugin)
* Windows Vista SP1: solved an issue in the kernel driver aswSP.sys (problems during system shutdown)
* added a workaround to a compatibility problem with NComputing NCT
* Standard Shield: improved handling of exceptions
* improvements in the rootkit submission system
* mail scanner: fixes in IMAP handler (Thunderbird)

Download-Avast Home edition