Last week, Microsoft released KB5074105, the latest non-security update for Windows 11 versions 24H2 and 25H2. Like it usually goes with such update, the release was packed with new features and changes, resulting in quite a hefty changelog. Shortly after, Microsoft updated the release notes to explain that KB5074105 introduced a new security feature, which was not mentioned in the original changelog.
With KB5074105, Windows 11 received an extra layer of security for system files. Now, the operating system won"t let you access Storage settings if you do not have administrator privileges. Users will be prompted with a User Account Control when navigating to Settings > System > Storage:
[Settings] New! To help ensure that only authorized Windows users can access system files, Windows now displays a User Account Control (UAC) prompt when you open Storage settings (Settings > System > Storage).
For those unfamiliar, the Storage section in the Settings app lets you manage all storage-related things (obviously) and run cleanup procedures by deleting temporary files, such as Recycle Bin content, Delivery Optimization files, file thumbnails, temporary files, and more. You can also configure Storage Spaces, drive optimization, set Storage Sense for automatic disk cleanup, specify where Windows should save new content, and more.
You can find the entire changelog for KB5074105 in our dedicated article (the official documentation is available here). Although Microsoft does not mention any specific known issues, there are already reports about various bugs and instabilities in KB5074105. Microsoft is aware that everyone hates Windows Updates these days, and in 2026, the company promises to change things and fix key pain points in Windows 11, including the excess of AI features that many consider nothing but bloatware.