Shell Hidden Window

For a split second when Win XP HE turns off I see a flash of a message
window that, over time, I've been able to partially decipher. I think it
says ""Shell Hidden Window" and involves Music Match that came with my Dell
machine. (Do I REALLY need that? Doesn't Windows Media Player do the same
thing? That's what I've been using whenever I need to listen to something.)



Anyway. the research I've been able to do so far points to a line entry on
the configuration statement (or whatever it's called); mimboot.exe. The
instructions I read on some guru thread said to run MSCONFIG and simply
uncheck the entry. Simple enough. However, when the machine reboots I get a
message telling me the machine is booting in "selective Startup" and
advising me to undo what I did, put it back into Normal Startup, and
restart.



I'm in running in a circle. Would someone please show me the way out.