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yesterday

Microsoft Investigates Windows 11 Startup Failures Caused by KB5058405 Update

Enterprise virtual machines report 0xc0000098 ACPI.sys errors after the May security update prompting Microsoft to develop a resolution.

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Overview

  • Microsoft has confirmed that the May 13 KB5058405 cumulative update prevents some Windows 11 22H2 and 23H2 devices from booting, displaying a 0xc0000098 recovery error.
  • The issue predominantly impacts enterprise environments running Azure Virtual Machines, Azure Virtual Desktop and on-premises VMs on Citrix or Hyper-V, with Windows 11 Home and Pro editions largely unaffected.
  • Affected systems reference ACPI.sys, the kernel-mode driver responsible for Advanced Configuration and Power Interface functions, indicating a critical boot dependency failure.
  • This incident follows earlier May update troubles, including a BitLocker recovery screen bug on Windows 10 and blocked Windows 11 24H2 feature updates via WSUS that prompted out-of-band fixes.
  • Microsoft’s Windows release health dashboard states engineers are investigating the failures and will issue a corrective patch once testing is complete.