Dell Venue 8 Pro (3845, Late 2014) - Manual (Page 25)

Using Your Tablet | 25
Resetting Your Tablet
CAUTION: Resetting your tablet erases all data from your
tablet, including your account configuration, apps, music,
pictures, files, and so on. Make sure that you back up all the
required data before you proceed.
Resetting your tablet returns Windows to original factory settings.
To reset your tablet:
1 Swipe in from the right‑edge of the display to access the charms.
2 Touch Settings → Change PC settings→ Update and recovery→
Recovery.
3 Touch Get started under Remove everything and reinstall
Windows.
4 Read the warning and touch Next.