The last thing you want right before or during an event is to be forced to update Windows, which could postpone your setup or interrupt your stream. While there is no way to turn off updates entirely, you can configure Windows settings to run updates only at certain times.
Open the Start menu and click the gearwheel to open Settings.
Select Update & security.
Under the Windows Update tab, click Change active hours.
You can choose a 12-hour time range during which Windows will not automatically update. If an update becomes available during that time frame, a notification will appear letting you know that your computer will restart outside of active hours.
If you do see the notification and feel your event is going to run longer, you can select Restart Options and tell Windows when to restart your computer to install updates.