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how do i stop computer from turning off

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my computer turns off in a short amt. of time i would like to increase the time of shut down

my computer turns off in a short amt. of time i would like to increase the time of shut down

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The power settings are controlled by the Windows operating system, not Firefox.

The How to configure the Windows 8 Power Plan and Settings tool on your Dell PC page has some detailed steps on how to adjust these settings. It's a Dell support page, but the steps should apply to any computer running Windows 8 or Windows 8.1.

Hope this helps.