I started my computer up for the first time in the morning
and went to log in using ctrl-alt-del. The initial login
screen that tells you to hit ctrl-alt-del disappeared for
a moment and just the background was displayed and then it
reappeared. I tried this several times with the same
results. I finally restarted the computer and everything
worked fine...

Has anyone heard of this happening before and any idea
what causes it to happen.

Compaq Deskpro PIII 550 w/ 128 MB RAM, WIN2K with latest
Windows updates applied.

Thanks,
Josh

Sorry, I guess I should have been more descriptive.
The computer is on a Windows NT network, and is not the
first time it has been started. The only thing recently
installed was a pop-up blocking software, but that was
almost a week ago. It appears to have been a freak thing,
but I was just wondering if anyone else has experienced
this problem.

Thanks,
Josh