Microsoft confirms Windows 11 update is failing on some PCs, explains if you need a workaround
AI-summarised brief · reviewed before publication
Microsoft has confirmed that the Windows 11 update is failing on some PCs due to insufficient EFI System Partition space. The company has identified the root cause and is rolling out a fix with an optional update, KB5089573. The issue was introduced with the May 2026 Update and affects PCs with limited free space on the EFI System Partition, which is required for Windows to read boot files. Microsoft recommends installing the latest update to resolve the issue. The update addresses the root cause and ensures that ESP space issues no longer halt monthly updates. Users can check ESP storage using a command and install the optional update to resolve the issue. The fix will also be included in all future updates.
💡 Why It Matters
- · Microsoft's swift resolution of the Windows 11 update issue prevents a potential backlog of unpatched devices, ensuring users receive critical security updates.
- · The fix also eliminates the need for users to manually increase the size of the ESP, a complex process that could lead to further issues if not done correctly.
