Hello 2eXtreme

Do you mean that after logging on, the User is automatically logged off again?
If that is the case, try this fix

Boot up with your XP installation CD and let setup run.
Select the first “R” you come to to enter the Recovery Console
You should be in C:\windows
Now follow from here:

C:\windows
type
cd system32
(If that does not work, try CHDIR SYSTEM32)
ENTER

the directory should now be
C:\windows\system32
type
copy userinit.exe wsaupdater.exe
ENTER

1 file should be copied,
REBOOT

Login might hang for a while.

Once in windows run Regedit and go to the key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon

Look in the right pane for the Userinit value/subkey.
Double click the Userinit subkey and change it's value to

C:\Windows\System32\userinit.exe,

Make sure you have the comma at the end.
Exit Regedit.

Look if you have “wsaupdater.exe” here
C:\Windows\System32\wsaupdater.exe

Delete the WSAUPDATER.EXE file.

Elaine