All downloads directly from official web site.

avast! 4 PDA Edition
(Recommend - Trial Download - Buy Now)
avast! 4 PDA Edition is a complete antivirus package for PalmOS and WinCE/PocketPC based devices.

avast! 4 PDA Edition includes the following components:

Scanning kernel - special "pocket version" of the avast scanning kernel with the following features:
» Small size and memory requirements
» High speed, and so a quick response even on slower CPUs
Installation - easy installation (the only one) from a PC, using standard tools for computer-PDA synchronization
Reports & logs - report files are created with detailed description of the scanning process. These files can be viewed by an integrated log viewer
Updates - special updater able to download and install new updates using the standard means of data transfer for mobile devices, i.e. GPRS and other; thus, it is fully integrated into the "pocket environment"

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avast! 4 Professional Edition
(Recommend - Trial Download - Buy Now)
avast! 4 Professional Edition is a complete ICSA certified antivirus package for business and office use - from SOHO to largest corporations. avast! 4 obtained multiple VB100% awards in Virus Bulletin comparative reviews under Microsoft Windows. avast! 4 was awarded as "The Best Anti-Malware Solution" by Secure Computing Magazine Europe in April 2006.

avast! 4 scans and protects your computers against viruses, worms and Trojans on any PC running Microsoft Windows workstation OS.