Windows XP was a major step for Windows ... there was a big focus on the Windows 10 logo itself. The hero wallpaper, as Microsoft calls it, actually received a few variants thoughout Windows ...

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 ...