Right-tap the lower-left corner on the desktop to open the Quick Access Menu, and open Run CMD. Type gpedit msc in the Command Prompt window and hit Enter. Find and open the setting named Prevent changing lock screen image.
Right-tap the lower-left corner on the desktop to open the Quick Access Menu, and open Run CMD. Type gpedit msc in the Command Prompt window and hit Enter. Find and open the setting named Prevent changing lock screen image.