Go into the services and disable it. Then reboot. When you do that try to install the program again.
With my systems; the first thing I do is disable windows defender and UAC. Neither one of them aren't needed and they both cause more probs than they are worth. Of course, windows defender used to be good, when it was giant.
EP, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS