Avast Free Antivirus 4.7.1098

* 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 (issue reported by Thierry Zoller of n.runs AG)
* Professional Edition: scheduled scan progress icon now accessible even in Windows Vista
* Windows 9x/ME: fix in the Mail Protection Wizard (related to Mozilla Thunderbird accounts)
* fixed a bug in the scan area selection dialog in Windows NT/2000
* optimizations in the updater
* removed mail heuristics false alarm (related to TNEF attachments)