It sounds like there's an auto-update to the AIM (AOL Instant Messenger) client that advertises their new “Away Page” feature. The advertisement (in the AIM client) says “Less right clicks, use the Away Page!” However, it's spooky, and it looks like a virus. As far as I can tell, it's not, but I'm not finding much information on the web about it.
I'm glad I don't use the regular AIM client. (I use Gaim, which is available for Windows and Linux.)
Update: my gaim isn't working for me anymore. I wonder if it's related to the “Less right clicks” thing. I spent an hour trying to figure it out, then gave up and switched to Google Talk. The buddies I care most about have switched too.