If your Surface tablet keeps freezing up or is acting unresponsive, it’s time to reset the device.
How To Perform a Hard Reset Surface tablet
* Hovering over the bottom right hand corner of the screen to open the Charms menu.
* Tap Settings and select More PC Settings. In PC setting, tap General.
* On the right right， tap on “Get start” button under either “Refresh without affecting your files” or “Reset and start over”.