Each of these 4K wallpapers (that's 3840x2160, pixel fans) has been set to a desktop-friendly 16:9 aspect ratio, and with minimal compression so they look super sharp on your monitor.

Someone even has a collection of all the old Windows wallpapers from 2000 onwards, re-scanned in at least HD, if not 4K from Getty Images and other original sources.

At the end of the day, the photo that covers the desktop of the computer, also known as wallpaper, is one of the images you see every day. Why not spend a few minutes customising it? Just be sure not ...