Got caught by Gator myself. First, it downloaded itself onto my computer even though I didn't want it. Then it would just start running on its own in the background and it's a real memory hog that slows down my computer considerably (uses about 100,000K or more of memory). I couldn't rid myself of it completely until I found Ad-Aware. Before that I could only delete some of the Gator files and so it kept coming back.