https://www.techradar.com/news/microsoft-joins-forces-with-intel-to-beat-spectre

In a fresh move to further shore up security, Microsoft is providing Intel’s Spectre fix for PCs with Skylake processors running Windows 10 – with further patches to be delivered for older generation CPUs in the future.

Of course, Intel is already pushing out Spectre (and Meltdown) patches itself, with numerous processor families seeing microcode updates released in the past few weeks; but Intel doesn’t supply these directly to end users.