This update is available on Windows 7, 8.1 and 10, though please note that this software patch is optional and should only be used by those who use affected Intel systems. If you haven't installed a Spectre Variant 2 BIOS update, you do not require this Windows update.
Full story:
https://overclock3d.net/news/cpu_ma...e_that_disables_intel_s_buggy_spectre_fixes/1