If you're giving a small presentation and you're not not using the second screen, then the above steps won't work. How to disable notifications while presenting onto a single screen If you're extending or using only the secondary display, the notifications will continue to flow. This option will only work as long as you connect using the 'Duplicate' option when projecting (Windows key + P). Once you completed the steps, every time you are giving a presentation and you're connected to a projector or secondary monitor, Windows 10 will not show notifications. Under Notifications, turn on the Hide notifications when I'm duplicating my screen option. VPN Deals: Lifetime license for $16, monthly plans at $1 & more