The screen saver on our computer was set to use 3D text, and was working without any problems; power setting was working also without any problems.
Now the screen saver does work, neither does the power settings. No hardware has been updated, and the only update which occurred was:
Security Monthly Quality Rollup for Windows 7 for x86 based system (KB4056894)
I checked to make sure no changes had been made to the screen saver screen and found none. I even checked the power settings and likewise found no changes.
I was looking in the wrong location in the Registry to make sure Screen Saver was set to active, but finally found the location and it was set to active--both in Admin and User accounts.
If the time setting for the screen saver is set to 5 minutes in either of the two accounts on our computer, the screen saver works as it should. But resetting time back to 15 minutes and the screen saver stops working.