'Specify the interval to run quick scans per day' (QuickScanInterval in hours Min:0 Max:24) This policy setting allows you to specify an interval at which to perform a quick scan. The time value is represented as the number of hours between quick scans. Valid values range from 1 (every hour) to 24 (once per day). If set to zero, interval quick scans will not occur. By default, this setting is set to 0. If you enable this setting, a quick scan will run at the interval specified. If you disable or do not configure this setting, a quick scan will run at a default time. Counter Measure: Configure this setting depending on your organization's requirements. Potential Impact: Quick scans can impact performance.

(1) GPO: Computer Configuration\Administrative Templates\Windows Components\Windows Defender\Scan\Specify the interval to run quick scans per day (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Scan\QuickScanInterval