Here are a couple things I learned from this. 1. No matter how much I think I know about safe practices, it is still possible to make a mistake. 2. If a program is denying access to regedit, try a startup manager instead. But I still haven't figured out why some of the programs under RUN are not putting icons in the tray. The only thing that makes me worry less about this is there is no information that says this worm/trojan knows stealth techniques.