Start the scheduled scan only when computer is on but not in use

This policy setting allows you to configure scheduled scans to start only when your computer is on but not in use.

If you enable or do not configure this setting, scheduled scans will only run when the computer is on but not in use.

If you disable this setting, scheduled scans will run at the scheduled time.

Supported on: At least Windows Server 2012, Windows 8 or Windows RT
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows Defender\Scan
Value NameScanOnlyIfIdle
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

windowsdefender.admx

Administrative Templates (Computers)

Administrative Templates (Users)