1. Open the Settings app in Windows 10 by pressing the Windows button and typing “settings” in the search box.
2. Click on “Personalization” located in the left pane of the settings window.
3. Select “Background” from the list of options.
4. Choose the type of background you wish to set, such as a solid color, picture, or slideshow.
5. Select your desired background from the choices provided or click “Browse” to upload a custom wallpaper of your own.
6. Once you have chosen the background image, click “Choose Picture” or “Set Slideshow”.
7. Click “Save Changes” to apply the new background.