Show clear logon background

Supported on: At least Windows Server 2016, Windows 10 Version 1903

Registry

HKLM Software\Policies\Microsoft\Windows\System

Value name: DisableAcrylicBackgroundOnLogon

Description

This policy setting disables the acrylic blur effect on logon background image. If you enable this policy, the logon background image shows without blur. If you disable or do not configure this policy, the logon background image adopts the acrylic blur effect.