How to restore the factory settings of Win8?

In the first step, move the mouse pointer to the upper right corner of the screen until the charms (Charm menu) appear, click “Set”.

Step 2: Select “Change PC Settings”.

Step 3; on the left side of the new window, select “General", click on the right side of “Delete all content and reinstall Windows" under “Start”.

Step 4: Because you need to delete all your personal data and applications, Windows will ask if you want to do it.

After the system will appear two options, "only delete my files" and "completely clean the drive", you can choose according to your own needs.