Mismatched Taskbar error prevents everything in the task bar from working, including the windows key. Reset your shell. Instructions in the “How to Solve” section of this post.
So, I love windows 10 multiple desktops (FINALLY!). But I noticed recently that when I switch back and forth several times in rapid succession, the task bar has a tendency to lag; resulting in a mis-match from the correct desktop.
Example Desktop 1 will have the corresponding task bar for Desktop 2 and Desktop 2 will have the task bar for Desktop 1.
How to Solve
Reset your Shell. If you don’t know how to do that here’s how.
Because this error prevented everything in the task bar from working, including the windows key, use Ctrl+Alt+Del to pull up the task manager.
Then find the first instance of explorer.exe. This is the shell containing the task bar. End that process.
To run it again. Click File > Run and type explorer, this will boot the shell again and get your task bar running.