Boot failure is a common issue that prevents proper PC startup. It can result from hardware malfunctions, corrupted system files, or boot configuration issues in Windows 11. A lot of users are unable ...

Frustrated with Windows 11 startup logo stuck issue? Discover proven troubleshooting fixes for 2026, from quick reboots to ...

Why it matters: Microsoft has issued guidance for fixing a serious Secure Boot vulnerability that affects all Windows systems and is actively being exploited in the wild. Normally, this kind of issue ...

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 ...