Update: thinking about this, I wonder if the boot partition drive letter was changed during the update process and never set back (since it failed):

http://support.microsoft.com/kb/249321


Reboot to safe mode and login as the workstation administrator.


>Hello all,
>
>A bit off topic, but here goes
>
>I have a remote office that has a Win2K Server running as a domain controller. There was a workstation that I applied a bunch of Windows Updates to that didn't finish installing (Froze) Upon reboot, it came up with the login dialog, but the combo for the domain was not there, just username and password. I tried the regular username/pass combo's and non seem to work. I am open to suggestions on how to get passed this before I just rebuild the box.
>
>Thanks in advance
>
>Bob