Press the Windows key plus the “C” key to open the Charms menu.
Select the Search option and type reinstall in the Search text field (do not press Enter).
Select the Settings option.
On the left side of the screen, select Remove everything and reinstall Windows.
On the “Reset your PC” screen, click Next.
On the “Do you want to fully clean your drive” screen, select Just remove my files to do a quick deletion or select Fully clean the drive to have all files erased.
On the “Ready to reset your PC” screen, click Reset.
(throw device into the river)