'Specify the day of the week to run a scheduled full scan to complete remediation' for Scan_ScheduleDay This policy setting allows you to specify the day of the week on which to perform a scheduled full scan in order to complete remediation. The scan can also be configured to run every day or to never run at all. This setting can be configured with the following ordinal number values: (0x0) Every Day (0x1) Sunday (0x2) Monday (0x3) Tuesday (0x4) Wednesday (0x5) Thursday (0x6) Friday (0x7) Saturday (0x8) Never (default) If you enable this setting, a scheduled full scan to complete remediation will run at the frequency specified. If you disable or do not configure this setting, a scheduled full scan to complete remediation will run at a default frequency. Counter Measure: Configure this setting depending on your organization's requirements. Potential Impact: A full scan can impact performance.

(1) GPO: Computer Configuration\Administrative Templates\Windows Components\Windows Defender\Remediation\Specify the day of the week to run a scheduled full scan to complete remediation (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Remediation\Scan_ScheduleDay