This is quite a complex set of mishaps. We really need more info....
Did these problems all appear at the same time? If so - What might have been the triggering factor? Windows update? Other software update? Or were they there at switch on without any previous identifiable symptoms?
Did you remove McAfee? Why? How? Did the other issues surface before or after? Is it possible that your have a virus or other trojan infection(s).
It seems to me as though the most satisfactory solution is a reformat of the HDD and a fresh installation of what you need (I know that this is a absolutely dreadful was to spend an afternoon). Probably best first to decide whether it is worth it. How old is the machine? What is it's general condition? Windows 8.x seemed to get a lot of negative comments. Better to start again with W10 perhaps? Can you get the drivers for the laptop if you were to do that?
I'm sorry - mostly questions without answers. I'm simply doing what I myself would if confronted with this unusual set of challenges.
Good luck whatever course you plot ....
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