Microsoft releases emergency fix for Windows 11 startup problems
Following the release of the KB5058405 update last month, Microsoft acknowledged that it was causing problems for some users. Affected users were left with startup issues and a warning of a 0xc0000098 error in the ACPI.sys file.
Now the company has released an out-of-band fix for the issue in the form of the KB5062170 update. Such is the impact of the original problem that Microsoft recommends installing this update in place of the May 2025 security update for Windows 11.
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.