Removes worms and trojans without troubles.

It's great, its free and its easy to use. What more is there to say? These 3 factors makes Avast the best Anti-Virus software you can get.

"alwil avast! home" was the only free antivir app that passed the june winxp test
(http://www.virusbtn.com/vb100/archives/tests.xml?200206)
I do not work for them, I was just looking for a good and free av solution.