User-Made Patch Lets Owners of Next-Gen CPUs Install Updates On Windows 7 & 8.1 (bleepingcomputer.com)
An anonymous reader quotes a report from BleepingComputer: GitHub user Zeffy has created a patch that removes a limitation that Microsoft imposed on users of 7th generation processors, a limit that prevents users from receiving Windows updates if they still use Windows 7 and 8.1. This limitation was delivered through Windows Update KB4012218 (March 2017 Patch Tuesday) and has made many owners of Intel Kaby Lake and AMD Bristol Ridge CPUs very angry last week, as they weren't able to install any Windows updates. Microsoft's move was controversial, but the company did its due diligence, and warned customers of its intention since January 2016, giving users enough time to update to Windows 10, move to a new OS, or downgrade their CPU, if they needed to remain on Windows 7 or 8.1 for various reasons. When the April 2017 Patch Tuesday came around last week, GitHub user Zeffy finally had the chance to test four batch scripts he created in March, after the release of KB4012218. His scripts worked as intended by patching Windows DLL files, skipping the CPU version check, and delivering updates to Windows 7 and 8.1 computers running 7th generation CPUs.
This is probably doing the opposite of what you're thinking--letting older software run on newer CPUs.
Linux had similar problems with running on Skylake and newer processors on kernels earlier than around [....]
Windows 7 and 8 have been running FINE (or reasonably well) on these Newer processors for over a Year; these operating systems are BARELY serviced anymore at all, Only occasional Defect updates come out for the latest bug in Internet Explorer, Flash, etc.
Even though Windows 8 is still under its promised MAINSTREAM support period which includes New hardware enablement, they're getting cut off for new security patches too.
The security updates Are not CPU-related. They work fine except for the arbitrary forced update disablement. MS is going out of their way to maliciously attack people who run Windows 7 and Windows 8 on newer hardware, that probably means they downgraded their OS and are running Windows 7 and 8 just fine, Because the old OSes will run on new CPUs just fine, and power management differences are not all that significant (And can be disabled, anyways).