Microsoft has released the KB5074105 preview cumulative update for Windows 11 systems, which includes 32 changes, including fixes for sign-in, boot, and activation issues.
KB5074105 is an optional update that delivers updates at the end of each month, allowing admins to test Windows bug fixes, new features, and improvements that will be generally available during next month's Patch Tuesday release.
However, unlike Patch Tuesday cumulative updates, monthly non-security preview updates only roll out quality improvements and do not include security fixes.
With the January 2025 optional update, Microsoft addressed a known issue that caused Explorer.exe to hang during the first login when certain apps were configured as startup apps.
It also fixed a bug that caused the system to stop responding during startup when Windows Boot Manager debugging is enabled, and another bug that triggered iSCSI boot failures with an "Inaccessible Boot Device" error.
Additionally, this month's preview update addresses an issue in which Windows license migrations could fail during upgrades because the PC couldn't register with the Windows Activation server for its digital license.
You can install KB5074105 by opening Settings, clicking on Windows Update, and then on 'Check for Updates.' Since this is an optional update, you will be prompted to install it by clicking the 'Download and install' link.
However, you can also manually install this optional cumulative update after downloading it from the Microsoft Update Catalog.
KB5074105 preview update (BleepingComputer)
Windows 11 KB5074105 highlights
... continue reading