Overview
Microsoft has released an out of band Critical Update KB4078130 to disable mitigation against CVE-2017-5715.
Note: We highly recommend reading this Microsoft article:Update to disable mitigation against Spectre, Variant 2
MSNS18-01-4078130 / KB4078130 is a Critical Non-Security Patch that will disable the fix for variant 2 for stability issues. The machine must reboot after installing the patch for it to apply on the system.
Additional Information
To enable the fix again you may reinstall the patch for your OS that remediates CVE-2017-5715