Microsoft Support: January 3, 2018—KB4056892 (OS Build 16299.192) (https://support.microsoft.com/en-us/help/4056892/windows-10-update-kb4056892) Meltdown is not specifically mentioned but it would fall under the security updates for the Windows Kernel. Windows Central: Microsoft pushing out emergency fix for newly disclosed processor exploit NOTE: Both listing indicate workarounds for an issue during install. Make sure to read them. Microsoft pushed out the update on January 3rd but it still was not available to me as of an hour ago. Some AV programs are apparently not compatible which will lead to a very ugly BSOD if the patch is installed. Windows update checks for compatibility before offering the update. Since I was not seeing the update available via WU I checked my ESET and Malwarebytes info to make sure both were compatible. They were. ESET: https://forum.eset.com/topic/14256-eset-product-compatibility-with-meltdown-fix/ Malwarebytes: https://blog.malwarebytes.com/security-world/2018/01/meltdown-and-spectre-what-you-need-to-know/ I checked to see if both were up-to-date on my system. Both were. I decided to reboot and after doing so the update became available and installed without issue. Now to see if I take any performance hits over time. NOTE: I recommend making sure your AV software is compatible. If it shows up in WU then it should be. Just don't blindly try to force it to install if it doesn't show up in WU.