argh

After working briefly, AIM died on me this evening, refusing to sign on. I defragged, cleaned up disk space, ran a virus check on AIM and my computer, uninstalled AIM, installed a newer version (which didn't work), uninstalled that, and did a system restore. Nada. Anyone got any ideas?

ETA: And then, it worked again. See comment to Lumsockkppuppett, below.