How do I stop logon window?

[Zoey]

I've done everything that the windows help files tells me to do to stop
the logon window at boot up and it still comes up.

I'm using the windows logon and I have cleaned out all the password
files (.pwl). The system is set as a desktop and still I have to resopnd
to the logon screen at bootup.

This then won't allow me to reinstall Office 2000 as it thinks this is a
multi-user machine and it will only install Office for the 'original'
user. I have no idea how this happened but I need to change back to a
single user machine.

How do I do this?

I'm using Windows 98.