With the latest update comes a new feature in Windows 10: if I want to log in, the Lockscreen goes blurry, thereby obscuring the background picture.
More information about this new feature can be found here, here and here.
Up til now I really enjoyed the nice pictures that Windows Spotlight bought to my lockscreen.
But the new blurryness hurts my eyes so much that I opted for a simple black background.
Good bye, Windows Spotlight!