Microsoft has confirmed that its May 2026 Windows 11 security update (KB5089549) may fail to install on some systems, triggering an error and rolling back changes during the process. The issue stems from the EFI System Partition (ESP) when it has 10 MB or less of free space available. The EFI System Partition (ESP) is... The post Windows 11 May 2026 Security Update Fails on Low Boot Partition Space appeared first on Petri IT Knowledgebase.

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