Right out of the box, Windows 8 is configured to manage your system power consumptions in order to lower energy bills as well as improve laptop battery life. This can be done by automatically dimming the computer display screen, shutting down the hard drive, powering off unused ports, and at the very last putting the computer into sleep mode when your computer isn’t being actively used.
Allowing Windows to manage power consumptions is great in most cases, but what if you don’t want your computer to automatically go to sleep or begin shutting down services and components because you’re not actively working with it?
For new users who don’t want Windows dimming the display or turning off the hard drive, disabling power management may just do the trick. Some systems run critical services and serve important functions, so shutting down the computer automatically to save energy may be the best thing.
To disable power management in Windows 8, press the Windows Key + X on your keyboard to show Windows 8 Tools Menu. The Windows Key is the key to the left of the spacebar with Windows logo.
When the Tools menu display, select Power Options.
Next, click Change plan settings as shown below
Finally, select Never for both options as shown below. Your computer will never go to sleep and the display will not be turned off inactivity.
This is great especially if the user will need to remotely connect to the machine. This is how you disable Power Management in Windows’ 8.