Windows 11 KB5120998: New features and issues

Microsoft released KB5120998 on August 27, 2026, as an optional preview cumulative update for Windows 11 versions 24H2 (build 26100.9278) and 25H2 (build 26200.9278). The update adds taskbar and Start menu customization, search changes, security-related platform features, and removes the WMIC command-line tool. Microsoft is investigating reports that mouse cursor personalization settings are reset after installation, and users are also reporting desktop wallpaper and text-rendering problems that Microsoft has not yet acknowledged. You can install the update from Settings > Windows Update > Advanced options > Optional updates. The September 2026 Patch Tuesday release is expected to include this preview's changes, but features that use a gradual rollout still reach devices over time rather than all at once, so availability can vary by device.
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https://4sysops.com/archives/windows-11-kb5120998-new-features-and-issues/