Turn Off Notifications on Windows 10
New Video with Easier Method; • Turn Off Notifications with Focus Assist (...
Turn "Get Office" and other notifications off on Windows 10.
To get to System;
Click Start, Click Settings, Click System and you'll see "Notifications & actions" on the left.
You can change the slider to off for any app listed there.
You can also type "Get Office" into Windows Search and right click the app and uninstall it. This works with apps listed under Notifications and actions.