Follow these few simple steps to change the Screen Timeout for your computer.
Right click on your desktop. You will see a menu. Click on the one called Personalize.
On the next menu window you need to click Lock screen.
On the next menu window you will nee to scroll down and click on Screen Timeout Settings
On the next menu window you will need to click on the drop down under Screen for a list of times. Click on the time you want your screen to turn off after.
You may close this window after choosing your time. Your screen will now be set to timeout at your prefered time.