Wow. with MS really fudging with those buggy notorious updates (yet again) this latest disturbance is really convincing (personally) for this user to keep them apart.
Microsoft has gone into the witness protection program. https://arstechnica.com/security/20...paring-is-making-a-mess-for-some-linux-users/ This article includes some specific steps a user can try (provided by a Linux Mint member). The user has to be able to still access their system's boot menu. There is still no guarantee that Linux will boot after implementing this change. Users who are impacted should check their specific Linux forum for guidance, whether the system is new or old (with SBoot in use).
Consecutive install of Windows then reinstall to Gnu/Linux may also be affected. My company internal distro was affected last week, so people changing OS on bussiness laptop had to postpone it by ~1 week. Anyway Secure Boot is enabled by default so a lot of people use it even on private laptop. Combined with FDE it adds to security, especially when travelling.