Policy
Scan removable drives
This policy setting allows you to manage whether or not to scan for malicious software and unwanted software in the contents of removable drives, such as USB flash drives, when running a full scan. If you enable this setting, removable drives will be scanned during any type of scan. If you disable or do not configure this setting, removable drives will not be scanned during a full scan. Removable drives may still be scanned during quick scan and custom scan.
b7745a069969 Scan_DisableRemovableDriveScanning Registry
Copy registry mappings
HKLM\Software\Policies\Microsoft\Windows Defender\Scan\DisableRemovableDriveScanning (enabled) = 0
HKLM\Software\Policies\Microsoft\Windows Defender\Scan\DisableRemovableDriveScanning (disabled) = 1 Policy notes
This policy setting allows you to manage whether or not to scan for malicious software and unwanted software in the contents of removable drives, such as USB flash drives, when running a full scan. If you enable this setting, removable drives will be scanned during any type of scan. If you disable or do not configure this setting, removable drives will not be scanned during a full scan. Removable drives may still be scanned during quick scan and custom scan.