Microsoft fixes Linux boot issues on dual-boot Windows systems

If your Ubuntu, Linux Mint or Debian system could not properly run as Dual Boot since Windows 11, it was because of this error that Microsoft has finally managed to fix.

Microsoft fixes Linux boot issues on dual-boot Windows systems

​Microsoft has fixed a known issue preventing Linux from booting on dual-boot systems with Secure Boot enabled after installing the August 2024 Windows security updates.

Microsoft had disturbed dual boot installations with Linux when starting with Windows updates. Now the problem should be solved.

Microsoft Fixes Windows Update That Broke GRUB in Dual-Boot Systems

Microsoft finally fixed the GRUB boot issue on dual-boot systems nine months after a Windows update caused widespread Linux boot failures.

Microsoft finally fixed a critical bug in May 2025 that blocked Linux installations on dual boot systems with active Secure Boot. The bug existed since the security update of August 2024 (KB5041585) and was fixed in May 2025 with the update KB5058405 as part of the last patch Tuesday. Background: SBAT and the Linux boot error The problem arose from the introduction of SBAT (Secure Boot Advanced Targeting). This extension for Secure Boot should b…

It took Microsoft nine months to fix a bug that failed to launch numerous Linux systems with dual boot last year. (Updates & Patches, Microsoft)