If you are stuck and can't boot into Windows after installing Arch, and instead of seeing the Windows Boot Manager, you see ...

The vulnerabilities were introduced when Lenovo inadvertently included an early development driver in the commercial versions of their software. Lenovo has released fixes for high-severity bios ...

I only know that secure boot is a feature that checks the system bootloader is properly signed by something/somebody authorized to do so. So it would make sense that ...

Acer has fixed a high-severity vulnerability affecting multiple laptop models that could enable local attackers to deactivate UEFI Secure Boot on targeted systems. The Secure Boot security feature ...

It sounds to me like claiming that all old Windows versions will be unbootable is an overstatement. Rather, it's most likely the case that you won't be able to boot old media when Secure Boot is ...