Can't log on with the same passcode as 2 days ago?

I have 2 Tablets and this 7" prestige Pro 7D sometimes work's better than 10.1. I have a set of dots to connect. and I have the pattern drawn on the inside of my box. I can't access it now. I tried rebooting. Let the battery run down and charge overnight. I don't have much that I would lose to do a factory reset. I followed the instruction per web page help {no help} book. If I can reset will it still have factory installs on it. Greatly appreciate anything you could do!