How to Enable MDS Mitigation?

I just updated my laptop to v1903 and installed KB4497165: Intel microcode updates. The security report looks fine apart from the extract below:

Speculation control settings for MDS [microarchitectural data sampling]
Windows OS support for MDS mitigation is present: True
Hardware is vulnerable to MDS: True
Windows OS support for MDS mitigation is enabled: False

Should I enable Windows OS support for MDS mitigation and how do I enable it?

Steve C said:

I just updated my laptop to v1903 and installed KB4497165: Intel microcode updates. The security report looks fine apart from the extract below:

Speculation control settings for MDS [microarchitectural data sampling]
Windows OS support for MDS mitigation is present: True
Hardware is vulnerable to MDS: True
Windows OS support for MDS mitigation is enabled: False

Should I enable Windows OS support for MDS mitigation and how do I enable it?

Have the same issue on my Windows 10 PC. Have tried to with adding new registry values, but didn't help. Perhaps MDS mitigation is not yet implemented for versions 1903 and 1809?

Updated KB4497165 for Windows 10 1903:
https://www.catalog.update.microsoft...aspx?q=4497165