In cortana

[WPCentral Question]

Hi.In Cortana, I type in lock screen and when I click on Lock screen in settings, it freezes and crashes. How do I fix this.This all began when I wanted to change my screen saver. Type in screen saver and click on it and nothing. Same thing when I go to Lock screen in personalization in settings. I click on Lock screen and nothing. It started working out of the blue and wham the lock screen option stopped working again, however, the screen saver option still works.