Why are all apps disabled?
All I know about "disabled apps" is when the device is booted into Safe Mode.

Maybe your device is on Safe Mode.&nbsp;&nbsp;This happened, when you "accidentally" pressed a button on your device while booting up.&nbsp;&nbsp;Try checking, if it has a "Safe Mode" displayed on your screen, usually at the corners.

Rebooting the device normally would surely fix the problem.