Please patient and read the instruction in several messages then.
1. Ctrl + Alt + Del to bring up Task Manager.
2. Click "New Task..." then click "Browse..."
3. Click My Computer on the left panel. Click C:\ - WINDOWS.
4. Navigate to explorer.exe, right click and copy explorer. Rename it to explorer1 (.exe)
5. Hit Cancel to go back to Create New Task window. Type regedit.exe and click OK.
6. In the registry editor, navigate to the following Key.