Computers possess no logic!
I tried the fixes suggested. Two accomplished nothing, and the third was too complicated for me to attempt (I have very limited computer skills). Anyway, thanks so much for the help.
Using my limited knowledge, I thought, "I'll fool this instrument of Satan!" I went into Control Panel, User Accounts, and Add a User. I created another account, logged off, logged on using the new account, and the Power Options was there! Complete with the defaults! The Power Options now work fine in both my user accounts!
Strange, creating a new account, restored ALL the defaults.
As I said, computers have no logic.