Windows 10: change lock & login screen background

How to Customize the Lock Screen on Windows 8 or 10



How to Change the Login Screen Background on Windows 10

Change the Windows 10 log-in screen background to a solid color - CNET

regedit.exe =>
HKEY_LOCAL_MACHINE > Software > Policies > Microsoft > Windows > System

New > DWORD (32-bit) Value  "DisableLogonBackgroundImage" = 1

to change the color of this new log-in background, just go to

Settings > Personalization > Colors and pick a new "accent color".

How to Change or Disable Login Screen Background Image in Windows 10? - AskVG