Sorry. Didn't read properly. Try this way:
Open the Local Group Policy Editor.(Type Gpedit.msc - This is not available in the "Home" releases, I'm afraid)
In the left pane, double click on User Configuration, Administrative Templates, and click on Start Menu and Taskbar.
(At this stage, I am hoping, for you, nothing is greyed out!)
Now, in the right pane of Start Menu and Taskbar, double click on "Change Start Menu power button".
Select Enable and choose one of the options in the lower pane.
Apply.
See if that works long term.