I have just finished installing BitDefender Antivirus Scanner for Unices which is free for personal use. You can ask for the license here.
It's very easy to setup, easy to update, and also quite fast on my desktop which only has 512 MB of RAM. It has a GUI interface, so you will have a fancy window-based application.
I know that Linux is virus-proof, but sometimes i wanted to disinfect files on my flash disk which was infected by Windows' virus/worms when they are plugged on other computer.