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Most of the settings you'll want to change in Windows 8.1 and Windows RT 8.1 are in PC settings. You'll find settings for screen resolution, adding and removing devices, personalizing the lock screen, changing the date and time, and adding user accounts.
If you don't see the setting you're looking for, it might be in Control Panel.
Article ID: 13767 - Last Review: 31 Aug 2016 - Revision: 15