That's an interesting one. My first thought is that there's a double registry entry for system doctor. It could also be the program itself is corrupted somehow. Odd, have you tried disabling the system doctor on startup and see if the ghost window still appears? Try that, if they both don't appear after it's disabled, try enabling it again and see what happens. If the problem reoccurs, start>run type in msconfig and press enter. The system configuration utility window should come up. Under the startup tab, ensure there isn't a double entry for the norton system doctor. Let me know what you find. Good luck.
I have Norton System Doctor set to run at startup. When it loads two windows appear. One is the regular Norton System Doctor window. The second is not much more than the title bar. Nothing happens if I attempt to close, minimize or maximize the second window. If I minimize the normal window and then open it again, I can move the normal window over the second window and it will literally wipe the second window off the desktop.
Any idea what's going on???