Microsoft has confirmed that Secure Boot certificate updates are failing or being blocked on some Windows 11 PCs.

Story time. A couple of weeks ago, I experienced a very odd thing with my computers. I was trying to reinstall Windows 11 on my primary device, and everything was going smoothly until the installer ...

Every Windows PC usually starts from the built-in hard drive, as the term “Windows PC” implies. This is because the Microsoft operating system is not anchored in or with the hardware, but is installed ...

A crucial Windows security certificate just expired - how to check your PC ...

Microsoft is investigating reports that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors after installing the January 2026 Patch Tuesday security updates. The issue ...

Microsoft is rolling out critical Secure Boot certificate updates to Windows 11 systems, with PCWorld reporting that current certificates expire in June 2026. Users must install quality updates and ...

The boot issue, which Microsoft previously investigated and linked to failed December 2025 updates, affected a limited number of commercial Windows 11 devices running versions 25H2 and 24H2.

If the Startup Impact column in Task Manager is showing Not measured, this post will help you. This usually means Windows is not tracking startup apps at boot time. The good news is that it is usually ...

Microsoft hasn't received much love for Windows 11, with many users still reluctant to ditch Windows 10 even four years after the newer OS launched. The main reasons include Microsoft's constant push ...

Certain older devices that cannot receive updates via their OEM may not be able to install the latest Secure Boot certificate ...