Final answer:
To turn off unknown sources on a Firestick, go to settings, select developer options, and toggle off the 'Apps from Unknown Sources' option.
Step-by-step explanation:
To turn off unknown sources on a Firestick, follow these steps:
- Go to the home screen of your Firestick.
- Click on 'Settings' at the top of the screen.
- Select 'My Fire TV' or 'Devices' (depending on your Firestick model).
- Choose 'Developer Options'.
- Toggle off the 'Apps from Unknown Sources' option.
By turning off unknown sources, you are preventing the installation of apps from unverified sources that may pose a security risk to your device.