Delete MSLicensing Registry Key

This is the way how to delete the mslicensing registry key :

1. On the client, navigate to the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing.
   
2. Click MSLicensing.
   
3. On the Registry menu, click Export Registry File.
   
4. In the File name box, type mslicensingbackup, and then click Save.
   If you need to restore this registry key in the future, double-click mslicensingbackup.reg.
   
5. On the Edit menu, click Delete, and then click Yes to confirm the deletion of the MSLicensing registry subkey.
   
6. Close Registry Editor, and then restart the computer.
   

When the client is restarted, the missing registry key is rebuilt.