This policy setting controls the load priority for the antimalware service. Increasing the load priority will allow for faster service startup but may impact performance.If you enable or do not configure this setting the antimalware service will load as a normal priority task.If you disable this setting the antimalware service will load as a low priority task.
Policy path:
Windows Components\Windows Defender
Scope:
Machine
Supported on:
At least Windows Server 2012 Windows 8 or Windows RT
Registry settings:
HKLM\Software\Policies\Microsoft\Windows Defender!AllowFastServiceStartup
Filename:
WindowsDefender.admx