Define the maximum size of downloaded files and attachments to be scanned

Supported on: At least Windows Server 2012, Windows 8 or Windows RT

Registry

HKLM Software\Policies\Microsoft\Windows Defender\Real-Time Protection

Value name: IOAVMaxSize

Options

IOAVMaxSize decimal - range 0-10000000

Description

This policy setting defines the maximum size (in kilobytes) of downloaded files and attachments that will be scanned. If you enable this setting, downloaded files and attachments smaller than the size specified will be scanned. If you disable or do not configure this setting, a default size will be applied.