in CMD
C:\Users\%username%>reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing Permanently delete the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing (Yes/No)? Yes The operation completed successfully.
in CMD
C:\Users\%username%>reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing Permanently delete the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing (Yes/No)? Yes The operation completed successfully.