I've been having problems with Microsoft OneCare on an PC running XP and Grisoft Free Edition on a PC running Vista. I have a 3 PC license for McAfee but it (like Norton AntiVirus) seems awfully heavy Moreover, McAfee insists on putting up all kinds of useless and annoying status messages. So, I decided to try the free...

avast! 4 Home Edition

So far it seems relatively lightweight. But, why does it insist on placing two icons on the status bar? Isn't one enough? And, what is it with the spoken status announcements? I think I need to keep looking around for a satisfactory free or fee anti-virus product.