Due to a bug in PowerToys version 0.95, Windows 11 users are experiencing automatic theme changes, disrupting their personalization settings. Microsoft confirmed that the new Light Switch feature, intended for future release, was mistakenly activated in a recent update.
Theme Changes and User Impact
Users have reported unexpected switches between light and dark themes, sometimes occurring every 30 seconds or reverting preferences. This unintended behavior began after a silent update was deployed on 2025-10-16. PowerToys misapplied a feature designed to alter themes based on local time or sunrise/sunset schedules.
Resolution and User Guidance
To mitigate this issue, affected users can manually turn off Light Switch by navigating to PowerToys, selecting System Tools, and disabling the feature. Microsoft is developing a corrective update to resolve this problem and aims to release it promptly. The company apologizes for the inconvenience and emphasizes that Light Switch was not meant to default to on.
