Ensure sufficient free space on the EFI System Partition before installing the update.

#1 - Installation fails with error 0x800f0922
Status: Investigating
Symptoms: Installation fails with error code 0x800f0922 on devices with limited ESP space.
Workaround: N/A
Affected: Devices with 10 MB or less free space on the EFI System Partition

May 2026 security update fails to install with error 0x800f0922



Symptoms

After you install this update (KB5089549), some devices might fail to complete installation with error code 0x800f0922. This issue occurs on devices that have limited free space on the EFI System Partition (ESP), especially if it has 10 MB or less available.
What you might experience on affected devices:

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