Daily Freeware Update Download

Portable ClamWin is the popular ClamWin Antivirus packaged as a portable app, so you can take your antivirus with you to scan files on the go.
ClamWin provides a graphical user interface to the Clam AntiVirus engine.
* High detection rates for viruses and spyware
* Regular virus database updates. [...]

This is the latest virus definitions for avast! 4 Home anti-virus program.
iAVS is a fast, small, incremental and fully automated update via the Internet. Updates are released at least twice a week. No reinstallation of the program is needed for virus database updates!