Changing the background of your desktop, lock screen, and sign-in screen is now easier than ever in Windows 10. This guide shows you how in a few simple steps.

Stardock's latest Windows 8 customization app removes this limitation by giving users the ability to pick any picture they want, regardless of size or color range, as the Start screen background.

In the Windows 10 Insider Preview Build 14291, Microsoft has added an option to show the lock screen background picture on the log-in screen.