I have searched all the posts about screen savers not working - it seems the only ones solved had to do with game devices interfering. I have W10 preinstalled on a new desktop computer and no gaming devices. When I go to the screen saver settings, it is always set at turning on after 1 minute, but it never does. If I put it at another time and keep the computer on, the screen saver works, but as others have found, if I shut down the computer, I'm back at no screen saver again. MS must have a fix for this since others have found this too.