If your Windows 11 PC runs version 23H2 or 22H2, you might need to download a new emergency update. KB5062170, with build numbers 22621.5415 and 22631.5415, is now available for download from the Microsoft Update Catalog. It contains a single fix for the bug causing errors when attempting to install last month's security update (KB5058405).
Microsoft acknowledged the bug with failing security updates a few days ago. The company confirmed that certain systems might experience a recovery error with the 0xc0000098 code when installing KB5058405 or the May 2025 security update for versions 23H2 and 22H2. Affected systems would show the following message: "Your PC/Device needs to be repaired. The operating system couldn't be loaded because a required file is missing or contains errors. File: ACPI.sys. Error code: 0xc0000098"
In the release notes, Microsoft adds that KB5062170 is not required on systems that installed KB5058405 without issues. Also, it is only available via the Microsoft Update Catalog, not Windows Update. You need to download KB5062170 only if your computer experiences the ACPI.sys error with code 0xc0000098. Another thing worth adding is that the out-of-band update is cumulative, which means there is no need to install any previously released updates. KB5062170 will bring all the previously released fixes and patches, including those in the May 2025 security update.
Like the May 2025 update for Windows 11 versions 22H2 and 23H2, KB5062170 has a single known issue. It affects Noto fonts in Chromium-based browsers (Microsoft Edge, Opera, Vivaldi, Chrome, etc.) when the system scaling is set to 100%. Microsoft recommends increasing the scaling to 125% or 150% as a temporary measure while the company works on a resolution.
You can download KB5062170 from the Microsoft Update catalog using this link. The update is not available in Windows Update. The official support article can be found here.
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