Computerworld - https://www.computerworld.com/article/3247676/microsoft-windows/microsofts-mystifying-meltdownspectre-patches-for-amd-processors.html#tk.rss_all
I’ve seen a lot of bizarre Microsoft patches-of-patches, but the new patches for AMD processors are in a world of their own. The security-only, manually downloadable patches appear to be Meltdown/Spectre patches for machines that were bricked by other bad patches, earlier this month, but they’ve arrived with no instructions — and a strange circular logic.
Last week, Microsoft released two patches, with these official titles:
The Win7 KB article