Default [Q] security and screen lock cause strings to crash

Help there, I seem to get a "unfortunately settings has crashed" whenever I try and get into the settings and screen lock tab. I am on a Motorola droid maxx xt1080 and can't seem to find any solution. I have tried the factory reset and I can't stay in safe mode. Also I can't seem to be able to install the latest update from 4.4. It goes through the motions then says install unsuccessful. Any help would be greatly appreciated.