It turns out I was unfected and didn't even know it! I patched XP as soon as the trouble started yesterday, but it was apparently too late. I updated Norton again this morning, ran it again, and there it was. Norton couldn't delete it, I had to go to Symantec and download a special removal tool. Seems to have worked, though I'm going to run Norton AGAIN just to make 100% sure. But again, since I patched everything seemed fine, but it was there and I didn't even know it. It was there. And I'm on dial-up for god's sake! I've always been good about protecting my machine and keeping up with updates, but from now on I'm going to be positively anal.;)