April 4, and part of the celebration includes new limited-edition wallpapers created by Microsoft designers and creators.

The photo you see above -- the default wallpaper for Windows XP -- is probably the most recognizable image in the world. What you probably didn't know is that it's a real photo, called Bliss ...

Microsoft is celebrating Windows 50 Year Anniversary! Download the new wallpapers in 4K both stock and video for Windows 50 ...