Microsoft has confirmed an unusual warning for Windows users updating their PCs. If you make a simple mistake, your PC “might remain in a state where it cannot accept further Windows security updates.” Bad news, especially as it will clearly be confusing if and when it happens.

Windows 11 24H2 is more stable than any release of Windows 11, but a bug causes installation issues with new cumulative updates.

Microsoft is warning of an issue when using a media support to install Windows 11, version 24H2, that causes the operating system to not accept further security updates.

To fix the problem, Microsoft says users will have to reinstall Windows 11 24H2 with the latest December security patch.

The bug specifically impacts Windows 11 24H2 installations created using manually prepared media with security updates from October or November 2024. Affected systems cannot accept future Windows security updates,

Installing some recent versions of Windows 11 could leave you vulnerable to security issues due to an update flaw; here's how to avoid the problem.