This is the software publisher's description.

Developed by one of the world’s leading IT security providers, Comodo AntiVirus 2 beta leverages multiple technologies (including on demand & on access scanning, email scanning, process monitoring and worm blocking) to immediately start cleaning or quarantining suspicious files from your hard drives, shared disks, emails, downloads and system memory.

Updated virus definitions are automatically downloaded according to a schedule of your choice or by a single click on the 'updater' button. Once installed, Comodo AntiVirus 2 will unobtrusively sit in your system tray, silently and efficiently defending your system from the latest virus outbreaks.

It's easy to install and configure, will not slow down your PC by hogging system resources and is free for life to the end user.

This free anti-virus client also contains free definition updates for life. There are no catches.