Open the RegistryEditor. (Press the Windows logo key + R, then type regedit, and select OK.)
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Creative
Under each subkey (S-1-5-21-… or user SID), there may or may not be more subkeys (131565…). If those subkeys exist, delete them. Don’t delete the “Creative” key.
Lock the screen.