Select Start, enter Display, select Display settings from the list of results, and then use the slider or turn the automatic adjustment on or off.
Note: If you don't see the slider, or if moving the slider doesn't change the brightness, try updating your display driver. Here's how: Select the Start button, enter (type) Device Manager, select Device Manager from the list of results, expand Display adapters, right-click (or press and hold) the name of the driver (each manufacturer has a different name), and then select Update Driver Software.
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Article ID: dd4fa9d7-56bb-4cd4-a109-221bd8a32fca - Last Review: Jun 8, 2016 - Revision: 5