ACPI.sys missing

Computer error

No prizes for guessing what's to blame for the latest problem that stops Windows 11 booting (yep, it's another OS update)

Windows updates that cause problems are far from being uncommon, sadly, but the latest issue is a pretty serious one. Some users who have installed the KB5058405 update from earlier this month have found themselves with an non-booting system.

Those affected will note a 0xc0000098 error in the ACPI.sys file, and a message informing them that their device needs to be repaired. The bad news does not end there. Microsoft does not yet have a fix -- or even a workaround.

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