When you are developing, testing, or running an NT system at home, you might want the system to perform an automatic logon each time it boots. This saves time if you crash the system regularly or bring it down and back up as part of a debug and test process. However, an automatic logon leaves your system wide open to unauthorized access and you should very carefully consider the implications. Do not implement this process on a production server or a machine accessible by more than just you.
Editing the Registry should be done only by experienced users and with extreme care and the Registry should always be exported or backed up before any changes are made.
1. Start the REGEDIT.EXE program.
2. Go to the key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\Current Version\Winlogon
3. Double click on the key AutoAdminLogon and change the value to 1
4. Verify that the DefaultDomainName and DefaultUserName are correct.
5. Click the right mouse button in the open area of the right panel and select the New String item from the menu.
6. Type DefaultPassword exactly for name of the new key entry and press the Enter key.
7. Double click on the key DefaultPassword and set its value to the correct password for the default user