I was forced to reset my Dell Venue 8 7000 (2015 model) today and due to the lack of instructions found on Google search I believe it’s now my responsibility to share the sequence here.  A factory reset will remove all user data and reset the Dell Venue 8 7000 to factory settings. Again, you’ll lose all saved data and images but if you’ve forgotten your password it’s the only way to resolve the problem. Note: I found this through trial and error. This may not be the official reset sequence (but I guess it is!)