Fix for Defender Updates task when Windows Updates svc is disabled

[ltguillaume]

In case you disable the Windows Update service, the Windows Defender Updates task that is enclosed in WuMgr releases will not work. Adding the argument -MMPC after -SignatureUpdate will fix this. The description for this argument is Performs update directly from Microsoft Malware Protection Center.

Sources: https://www.askvg.com/how-to-update-microsoft-security-essentials-mse-virus-definitions-using-command-line-and-without-using-windows-automatic-update/ (last comment by Phil) https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-antivirus/manage-protection-updates-windows-defender-antivirus#use-group-policy-to-manage-the-update-location