The Windows Wallpaper Wiki provides detailed history and often links to original file versions.
Sites like WallpapersWide host the "Hero" image in multiple aspect ratios and resolutions up to UHD. How to Apply the Wallpaper Once you have the file: How to Change Desktop Wallpaper in Windows 10 3840x2160 How to Get the Old Windows 10 Default...
Since newer versions of Windows 10 only include the updated, lighter wallpaper, you can find the original 4K file on reputable archival or community sites: The Windows Wallpaper Wiki provides detailed history and
You can find the raw 4K image on sites like Imgur or Reddit . 3840x2160 How to Get the Old Windows 10 Default...