As it turns out, Microsoft has since explained that customers using problematic AV software won't be able to receive future security updates for Windows, including today's Patch Tuesday update (which should include the security fixes from January 3).
"To prevent AMD customers from getting into an unbootable state, Microsoft will temporarily pause sending the following Windows operating system updates to devices with impacted AMD processors at this time", Microsoft said in a statement on its support site.
Intel said its processors would be affected based on the type of operations the CPU would carry out, saying that syscall-heavy processes would suffer the most. Users have taken the Microsoft forums to share the issues with the patches which allegedly stops PCs from booting.
Performance Dip on Old Windows Versions Due Meltdown & Spectre Fixes
Meltdown and Spectre fiasco is affecting nearly all Windows PCs and Phones and with processors manufactured by Intel, AMD, and ARM.
And Microsoft and AMD are working on the issue, but the fact that an unknown number of PC owners with AMD CPUs are going to have to wait to have their devices protected from the unsafe bug is incredibly disappointing.
According to reports, users with affected hardware found that after the security patch was installed they found themselves facing the Windows boot-up screen, and then nothing more. Unfortunately, it seems it's not easy to disable the automatic updates without gpedit tweaks, so it tries installing and rolling-back the update over and over. I could find only some German and Italian people reporting the same issue (well the CPU is quite pre-historic and the KB update is very fresh), but no info / acknowledgment from the MS so far.
The company has blamed AMD's own documentation, which apparently does "not conform to the documentation previously provided to Microsoft". If you have experienced an unbootable state or for more information see KB4073707.More news: Leonard suffers tear, out of National Basketball Association action