The default Windows 10 wallpaper, which is the one with the light beams and the Windows logo, can be found inside the 'C:\Windows\Web\4K\Wallpaper\Windows' folder. Surprisingly, all three folders have wallpapers and different ones at that. The Web folder houses 3 sub-folders which are called: 4K, Screen, and Wallpaper. This is not really an obvious place to find wallpapers, is it? One would think the folder is probably something related to the internet. Open File Explorer and navigate to the following folder or copy the path and jump to it directly: C:\Windows\Web.
