Reset your Surface from the USB recovery drive by following these steps:

Shut down your Surface and plug it in so you don’t run out of power during the refresh.
Insert the USB recovery drive into the USB port.
Press and hold the volume-down button while you press and release the power button. When the Surface logo appears, release the volume-down button.
When prompted, select the language and keyboard layout you want.
Select Troubleshoot > Reset your PC.
If prompted for a recovery key, select Skip this drive at the bottom of the screen.
Select the operating system you want to reset. This refers to the current operating system installed on your Surface.
Select Yes, repartition the drives. On the next page, select Next.
Choose either Just remove my files or Fully clean the drive.
The option to clean the drive is more secure but takes much longer. For example, if you are recycling your Surface, you should clean the drive. If you are keeping your Surface, you just need to remove your files.
Select Reset.
Surface restarts and the Surface logo appears while the reset process continues (this can take several minutes).
Surface 2 only: After restart, your Surface may prompt you to clear the TPM (Trusted Platform Module). Press F12 or the volume-up button to clear the TPM.

Here’s what to do after you’ve reset your Surface:

Complete the Surface setup steps, including selecting your region and language.
Sign in with the same Microsoft account you were using before so that things like the Windows apps you purchased will be available to reinstall. For more info, see All about accounts.
Check for important updates. See Install Surface and Windows updates.
Reinstall Windows apps:
1. Go to Start , and select Microsoft Store > Account > My apps.
2. Select the apps you want to install, and select Install.