Sol I would be confident in saying that setting them back to factory defaults to overcome anything you may do Alan will not make anything worse
I accept that it should still work after setting back to factory defaults,
but my son now manages the I.T. department of a college after working up through the ranks when he configured / set up all the computers for the technology classes,
and if I undo his enhancements and cannot restore back to his settings then my system will be degraded until :-
He next makes a 600 mile round trip to visit ;
or TeamViewer gives him remote control of my BIOS settings ;
or I risk my sanity trying to understand the unpredictable world of Windows Computers.