[WindowsCentral.com]

By default, Windows 10 puts your display to sleep in less than half an hour after you leave it untouched, and a PC will typically hibernate after a few hours. Here's how to configure and customize those settings.
For a desktop PC, the sleep settings are less of an issue because you're not restricted by a battery. Notebooks and mobile devices are different, requiring conservative sleep settings to get as much juice from the battery as possible. You don't want your laptop draining power when you're not using it, so here's how you can easily configure sleep settings in Windows 10.

Full story from the WindowsCentral blog...