Microsoft has admitted that the May 2026 security update might fail to install with a Something didnt go as planned. Undoing changes message. The problem is related to the EFI System Partition ESP, which is usually where the device boots from. Its minimum size is 200 MB, and the operating system manages it. However, if there is 10 MB or less free space, then the update might fail with a 0x800f0922 error code and the helpful message. On affected devices, the installation might proceed through...
