Boot Issues
Windows 11 KB5077181 fixes boot failures linked to failed updates
Microsoft says it has resolved a Windows 11 bug that caused some commercial systems to fail to boot with an “UNMOUNTABLE_BOOT_VOLUME” error after installing recent security updates, with the fix delivered in the February 2026 Patch Tuesday update. The boot issue, which Microsoft previously investigated and linked to failed December 2025 updates, affected a limited number of […]
Microsoft links Windows 11 boot failures to failed December 2025 update
Microsoft has linked recent reports of Windows 11 boot failures after installing the January 2026 updates to previously failed attempts to install the December 2025 security update, which left systems in an “improper state.” The boot failures were first reported earlier this month after users installed the January 2026 Patch Tuesday cumulative update, KB5074109, on Windows 11 […]
Microsoft investigates Windows 11 boot failures after January updates
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 affects Windows 11 version 25H2 and all editions of Windows 11 version 24H2 after installing the KB5074109 cumulative update released as part of this month’s updates. According to Microsoft, some customers have […]
Microsoft fixes Surface Hub boot issues with emergency update
Microsoft has released an emergency update to fix a known issue causing startup failures for some Surface Hub v1 devices running Windows 10. As the company explained when it acknowledged this issue last week, users see Secure Boot Violation errors on affected devices, prompting them to check the Secure Boot Policy in setup. These boot problems only […]
Microsoft: Windows 11 might fail to start after installing KB5058405
Microsoft has confirmed that some Windows 11 systems might fail to start after installing the KB5058405 cumulative update released during this month’s Patch Tuesday. On affected devices, users see 0xc0000098 recovery errors in ACPI.sys, warning that the device has to be repaired because the operating system couldn’t be loaded. ACPI.sys is the Windows Advanced Configuration […]
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. The list of affected systems includes those running client (Windows 10 and Windows 11) and server (Windows Server 2012 and later) OS versions. This issue is triggered by a Secure Boot Advanced Targeting (SBAT) […]
Microsoft tests new Windows 11 tool to remotely fix boot crashes
Microsoft has begun testing a new Windows 11 tool called Quick Machine Recovery, which is designed to remotely deploy fixes for buggy drivers and configurations that prevent the operating system from starting. The tool is part of Microsoft’s Windows Resiliency Initiative, an effort to enhance system stability and reduce downtime by introducing automated tools and features […]
Microsoft shares temp fix for Linux boot issues on dual-boot systems
Microsoft has provided a workaround to temporarily fix a known issue that is blocking Linux from booting on dual-boot systems with Secure Boot enabled. The company says this temporary fix can help Linux users revive unbootable systems displaying “Something has gone seriously wrong: SBAT self-check failed: Security Policy Violation” errors after installing the August 2024 […]
Microsoft confirms August updates break Linux boot in dual-boot systems
Microsoft has confirmed the August 2024 Windows security updates are causing Linux booting issues on dual-boot systems with Secure Boot enabled. The issue is caused by a Secure Boot Advanced Targeting (SBAT) update applied to block Linux boot loaders unpatched against the CVE-2022-2601 GRUB2 Secure Boot bypass vulnerability. “Resulting from this issue, your device might fail to boot […]
New Windows updates break dual boot on some Linux systems
According to user reports following this month’s Patch Tuesday, the August 2024 Windows updates are breaking dual boot on Linux systems with Secure Boot enabled. This issue is caused by Microsoft’s decision to apply a Secure Boot Advanced Targeting (SBAT) update to block Linux boot loaders unpatched against the CVE-2022-2601 GRUB2 Secure Boot bypass vulnerability, which could […]