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.
Microsoft issues emergency patches for Windows Hyper-V problems
Earlier this month, Microsoft released the KB5021237 and KB5021249 updates which it later confirmed were causing Hyper-V issues for some users.
Now the company has now released a pair of out-of-band patches to address the virtual machine problems. The KB5022553 and KB5022554 updates have been issued as emergency fixes for affected systems.