Bizarre New Windows 11 Bug Can Block Security Updates

Microsoft has recently found a strange bug in some Windows 11 installations. This may prevent certain users from receiving important security updates. And unfortunately, all it takes to trigger this glitch is to install Windows from a CD or USB drive.

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, which means the devices can be exposed to vulnerabilities, as reported by Bleeping Computer.

This issue is widespread, affecting enterprise users who set up PCs in business or educational environments as well as people who have recently built their own systems. Luckily, the bug does not affect PCs that received October or November patches through standard channels like Windows Update or the Microsoft Update Catalog.

Microsoft has acknowledged the issue and is actively working on a solution. In the meantime, Microsoft has recommended creating new Windows 11 installation media that includes the December 2024 patch update. This build, which was released on December 10th, does not trigger the update bug. You’ll have to start from scratch with a new Windows install, but you should be able to get updates again immediately.

For future installations, Microsoft recommends to make sure that all Windows 11 24H2 installation media includes the the latest monthly security update to avoid this issue entirely. You can always get the latest official build of Windows direct from Microsoft. So, it’s probably time to reformat that USB drive that’s been floating around in your desk drawer since the release of Windows 11.