Outlook 2019 won't close, computer can't shutdown

This is a common bug in Outlook 2019 (Windows Program) after a fresh install. The most annoying part of it is that your computer won't shutdown after clicking the Shutdown button (nothing will happen).

Symptoms:

1) You close Outlook but it will stay open in the Taskbar (righ-clicking and clicking "Close" doesn't do anything), the only way to close Outlook is by forcing it in the Task Manager (with CTRL+SHIFT+ESC).

2) Computer won't shutdown.

Solution:

Open Outlook, go to "File", "Office Account" and in the pane on the right - click "Update Options", finally click "Update Now".

That's it, follow the instructions and the update will fix the issue.