How to Adjust Sleep Mode
The sleep settings in Windows control the power-saving options for your computer. Sleep is particularly useful for laptop computers, as it allows you to manage battery usage while maintaining the ability to quickly go back to a full-power state. Sleep mode requires a very low amount of power, and thus dramatically increases the length of a battery charge if you leave your computer unattended. Furthermore, if your battery charge becomes critically low, Windows will automatically change your computer from sleep to hibernation mode, which prevents data loss.
Click "Start." Type "Sleep" in the search box and press the "Enter" key. This opens a new window that contains the sleep settings.
Click in the "Turn off the display" drop-down menu and choose how long after activity the computer should wait to turn off the display.
Click in the "Put the computer to sleep" drop-down menu and choose how long your computer must sit idle before Windows initializes the sleep mode.
Click the "Save changes" button at the bottom. Changes take effect immediately.