Have someone who knows what they're doing go (URL) for instructions on how to get rid of it ASAP.
Spyware like this is really getting to be a pain in the butt, and sometimes even following these instructions won't completely eliminate the problem. The easiest way to avoid a lot of this crap is to use Firefox. If you want a good program for cleaning crap like this off your pc, I'd suggest Webroot's Spy Sweeper. (Unfortunately, for folks using Norton's Antivirus and Internet Security, they have been really crappy with detecting, preventing, and cleaning up spyware intrusions.)
Patti, if you're going to switch to a dialup service and decide to go with Earthlink, they have a version of Spy Sweeper included in their software.