user environment.

[Mo]

I get a window when I turn on the computer saying that
my "user environment" can't be found.I have to hit okay
to start Windows and then I lose all my settings.

 

[Sharon F]

I get a window when I turn on the computer saying that
my "user environment" can't be found.I have to hit okay
to start Windows and then I lose all my settings.

This article looks like it may be a match for the problem you describe:
Cannot Add Local Users with the User Accounts Tool if Computer Is a Domain Member
http://support.microsoft.com/default.aspx?scid=kb;en-us;309428&Product=winxp

It suggests that this situation can be rectified by installing SP1. If the
problem persists, one of the 2 workarounds also described in the
article might help.