Hard Reset PIPO Work W7

First method:

1. Start by holding down the Power key to turn the device back on.
2. Swipe in from the right edge of the screen in order to select Settings.
3. Then tap Change PC settings and choose Update and recovery.
4. In this step select Recovery.
5. Afterwards search and choose option Remove everything and reinstall Windows.
6. When the appropiate information pop-up comes up tap Next to begin the process.
7. Success! After about 30 minuts your tablet is ready to use.

Second method:

1. At the very beginning hold down the Power key in order to switch on the device.
2. Afterwards hold down Shift key. If you're using the on-screen keyboard, tap or click the Shift key.
3. While the Shift key is still pressed, tap or click Restart option and confirm the operation.
4. In the next step choose Troubleshoot.
5. Then tap Reset your PC and cofirm operation by pressing Next.
6. Choose either Just remove my files or Fully clean the drive.
7. Begin the whole operation by clicking Reset.
8. Good job! You have just performed the hard reset operation.

Source : http://www.hardreset.info/devices/pipo/pipo-work-w7/