Windows 10: Notifications panel and Calendar appear at random

PC has started to randdonly show Notifications panel and then the Calendar. The browser sometimes also just instantly minimises itself. I have done nothing new to the PC

:)

 

Calendar Notifications Stopped Working / Appearing

My Calendar notifications have stopped working.
The Calendar App is working fine and I have no problem adding events.
When I navigate to Settings > System > Notifications the Calendar App does not appear. See screen shot below.
I am used to relying on the Calendar notifications or reminders, any suggestions are appreciated.

 

Lots of Random Notifications?


So I get a lot of random notifications from the action center. Most of the time, the notification shows up for half a second and goes away before I even get a chance to read then. Then its not even listed in the action center bar.

So I've since disabled all the notifications in the settings panel... and I still get random notifications.

 

Calendar Notifications Stopped Working / Appearing

Still not working. I want Calendar Notifications (events I added to calendar) to appear in the bottom right corner of my Desktop. Also want them to appear in the Action Center (icon to the right of the clock).