I had the same pronlem. Please try my fix and lose faith in Microsoft (again) if this fix helps you.
I determined that it was cortina that was in the lastest update, so I disabled my microphone, as I have noted on another pc that without a microphone, cortina does not start.
after a reboot this left me with the PC getting stuck in a loop trying to update. So obviously it was looking for the driver fix. After an hour I did jsut turn it off, and then restarted the machine.
the microphone is enabled again, wihtout my intervention.
The task bar works fine and I am not seeing any problems when I restart.
So try disbling any microphone you have and see if you find any release from the problem.