Policy

Configure performance mode status

This policy controls Microsoft Defender Antivirus performance mode for Dev Drives. A Dev Drive is a disk drive optimized for higher performance in software development scenarios. When this policy is Enabled or not configured, Performance mode is turned on for Microsoft Defender Antivirus. In Performance mode, Microsoft Defender Antivirus security checks of content stored on Dev Drives are conducted asynchronously to enhance performance. Performance mode requires the following policies also be enabled: “Enable dev drive”, and “Dev drive filter attach policy”. If you either Enable or do not configure this policy setting, Performance mode is turned on. If you Disable this policy setting, Performance mode is turned off and Microsoft Defender Antivirus will protect a Dev Drive in the same way as other drives.

Policy
Pack Microsoft Windows
Category Windows Components / Microsoft Defender Antivirus / Real-time Protection
Policy ID d36732f5612a
Internal name RealtimeProtection_PerformanceModeStatus

Registry

Copy registry mappings

HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableAsyncScanOnOpen (enabled) = 0
HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableAsyncScanOnOpen (disabled) = 1

Policy notes

This policy controls Microsoft Defender Antivirus performance mode for Dev Drives. A Dev Drive is a disk drive optimized for higher performance in software development scenarios. When this policy is Enabled or not configured, Performance mode is turned on for Microsoft Defender Antivirus. In Performance mode, Microsoft Defender Antivirus security checks of content stored on Dev Drives are conducted asynchronously to enhance performance. Performance mode requires the following policies also be enabled: “Enable dev drive”, and “Dev drive filter attach policy”. If you either Enable or do not configure this policy setting, Performance mode is turned on. If you Disable this policy setting, Performance mode is turned off and Microsoft Defender Antivirus will protect a Dev Drive in the same way as other drives.

Related policies

Configure local setting override for monitoring file and program activity on your computerConfigure local setting override for monitoring for incoming and outgoing file activityConfigure local setting override for scanning all downloaded files and attachmentsConfigure local setting override for turn on behavior monitoringConfigure local setting override to turn on real-time protectionConfigure monitoring for incoming and outgoing file and program activityConfigure real-time protection and Security Intelligence Updates during OOBE