Why wont my start button work on windows 10

[WPCentral Question]

All I have is a message Critial Error, start menu and Cortana aren't working taking up half the screen and wont go away. It ways they will try to fix it next time I sign in but this has gone on the 3 days now. Please help

 

[RumoredNow]

Maybe this will help?

http://forums.windowscentral.com/wi...u-cortana-not-working-fix-here-hopefully.html