Go to the win7 system and click the control panel options in the start menu.When you get into the control panel window, the upper right view defaults to category, changes to small icons or large icons, and then in the options, click power options to enter the power settings.There are two power options, "balance" and "energy saving", we generally choose balance, this option is the system and recommended to use default settings to set detailed balance, click change behind the plan set".Enter the power balance settings page, see detailed set of protection power supply, divided into the battery and the power supply is switched on, the system adopted in time driven measures as following: reduce the display brightness, turn off the display, the computer to sleep.
The control panel, power management, power supply or corner there is a sign right click, point!
Control panel - system and security - Power Options
Control panel - power management. Two: taskbar power icon.