Optimizing Apps on Android Device

When I turn on device, it goes through the normal procedure, to the point when Android window comes up.. it slowly darkens to light as they do while loading the Apps.. then it goes to a screen that says " Optimizing Apps" . at this point it may start at Opting 1-10.. or 25 -77, or what ever never the same twice... (After many attemps) then it completes and goes back to Android Screen and just sit there.... eventually shutting down.. I have pushed the (reset) button with a paper clip.. it does nothing but start the cycle over..... Any help next to turning this into a Frisbee would be helpful Thanks... Jeff