I'm pretty certain chris uses me - but there is never one around when you want one ;(
this is a longshot
when you get the logon - type a userid you want to use - no password and OK
logoff and see
if not
Suppose you want to delete user account associated with the user name John. Logon to the computer as some other user, who has full access to the system.
Run Registry Editor (RegEdit.exe) and find the following key:
HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ ProfileList \ John
If this key does not exist, go to step 4. Otherwise, make a note of the value of the variable ProfileImagePath, if any. It contains the DOS path to the folder in which the profile for this user is stored (it is C:\Windows\Profiles\John by default).
With Windows Explorer, delete the user profile folder, as determined in step 2, if the folder exists.
Delete the John subkey of the ProfileList key in the Registry and exit the Registry Editor.
Run Notepad (or any other text editor, but not a word processor!) and open the file System.ini, located in the Windows folder.
Find the section [Password Lists] in this file and make a note of the value of the variable John in this section. It contains the path to the password list file associated with the user John. ( C:\WINDOWS\JOHN.PWL by default). Delete the line JOHN=C:\WINDOWS\JOHN.PWL line from the [Password Lists] section and save the System.ini file. Exit Notepad.
With Windows Explorer, find and delete the JOHN.PWL file determined in step 6.
Delete all other files and/or folders you might have previously allocated for use by the user John.