Caution: Worms Spreading by IM
During the past several weeks, AOL has observed an increased number of small malicious programs called worms spreading by instant message (or IM). AOL helps protect AOL and AIM users by blocking instant messages containing hyperlinks known to be associated with the worms; however, you should always be cautious with any hyperlink you receive in an e-mail or IM. Once a worm infects a computer, the worm spreads itself by sending an instant message containing a hyperlink to every contact on the infected user's buddy list. You will only be infected if you click on the hyperlink and download the file.
To help avoid being infected by an AIM worm or any other virus:
More Details on AIM Worms Spreading