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Type power in the Start Menu’s
search box and select Power Options from the
search results.
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Click Change plan settings under the power plan
you’re currently using.
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Click Change advanced power settings.
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Click Change settings that are currently
unavailable to unlock the settings in the Power
Options window.
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Expand Processor Power Management.
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Expand Maximum Power State.
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Adjust the percentages for on "Battery" to 100%.
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Adjust the percentages for on "Plugged in" to
100%.
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Click OK to save the changes.