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Microsoft's May Security Update Fails to Install for Some

Rachel Lin 22.05.2026

Insufficient Space: A Growing Concern

Microsoft released its May Security Update for Windows 11, but some users are having trouble installing it. The update contains dozens of patches, but a glitch is preventing it from installing on certain devices. This issue started in May.

The problem occurs when the EFI System Partition (ESP) doesn't have enough free space, causing the update to fail and leaving systems unprotected. The error message Something didn’t go as planned. Undoing changesis all some users see.

Can Microsoft Fix the Glitch?

Devices with limited free space on the ESP are affected by this issue. As updates become more complex, the required space is increasing, and some systems are not equipped to handle it. The ESP is a critical partition that stores boot loaders and other essential data.

The lack of a clear error message is frustrating for users, who are left wondering what went wrong. Microsoft needs to address this issue to ensure all users can install the update.

Frequently Asked Questions

The failure to install the May Security Update leaves systems vulnerable to security risks. Users who can't install the update are exposed to potential threats, and Microsoft must resolve this issue quickly.

Q: Why is the May Security Update failing to install? A: The update is failing due to insufficient free space on the EFI System Partition. Q: What happens when the update fails? A: The update rolls back, and users see an error message. Q: Are all Windows 11 users affected? A: No, only devices with limited free space on the ESP are affected.

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