1. Create a batch file using notepad and call it (for want of a better name) “FixLockedDesktopProcs.cmd”
2. Type the following instructions in the batch file:
@echo off
cd %SystemDirectory%
Taskkill /F /IM Runtimebroker.exe > nul
RuntimeBroker.exe
3. Save the batch file to somewhere on your computer, then create a desktop shortcut to it.

Whenever the Start Menu or Cortana or Windows Edge cease functioning, simply run this batch file
by double-clicking on the desktop shortcut.

It is quicker than restarting or logging off then back on.