Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: 322756
How to back up and restore the registry in Windows
To restore the default Windows logon interface, remove the following string value from the registry:
After you do so, Windows uses the default Graphical Identification and Authentication file (Msgina.dll).