I navigated to a webpage that I think had some malware on it. I got a message saying that Software Update needed my password. I wasn't running Software Update, so I quickly shut it down. I've been watching Activity Monitor like a hawk for the last few minutes, and nothing seems out of the ordinary. No processes that aren't immediately identifiable as stuff that's supposed to be there. I'm running 10.6.8 and the latest versions of Safari, Flash, and Java, and all of my security stuff is up to date. All I hear about anti-virus software is that it usually does more harm than good. I'm just curious if there is something I should be on the lookout for, or if I'm freaking out over nothing.