the other day I was using a CTX projector for a Power
Point presentation. I disabled one of the monitor
adapters so it would work. When I went back to fix it. I
disabled a different one on accident. Now, Windows Xp
starts up but instead of the log in screen it goes blank.
I have a fairly new Dell Inspiron 1100. Does anyone know
how to fix this problem?

Have you tried going into safe mode? (tap f8 while the
system boots up) Hopefully you'll be able to get into
windows and device manager that way.