Installs Cumulative Update on Windows 10 1703 Version.
Does not update other releases of Windows 10 such as 1803, 1709, 1607, 1511 or the Initial release.
A reboot is required but will not be initiated by this deployment, however depending on your environment Windows Update may reboot the computer.
Microsoft has listed known issues for this update. Please see the links below for more details.
Meltdown (CVE-2017-5754) specific information: