I dunno, a good 90% of it is me writing emails.
If the other 10% is Jason Bourne shit, it's still a winner.
In other news, Windows 10 has recently decided to minimize any software I'm using to tell me I need updates or that I need to buy the newest Office.
I don't know anything about Windows 10, but Windows 7 does the exact thing you describe, and it can be turned off. Somewhere in the Automatic Updates config is an option to turn off the notifications.
Also, if you look at your services (type "services.msc" in the Run menu if there is one somewhere), you can disable any with the word "office" in the name.
My gf uses Windows 7 to play League of Legends (has an annoying bug in Linux) and the same thing you talk about used to interrupt her game right in the middle all the time and get her character killed.
Stupid behaviour that should not be default!