Microsoft has confirmed two issues with the Windows 11 KB5071142 update, which was released on December 1, 2025. The update brings a host of new features, including an enhanced Dark Mode in File Explorer, improved Xbox full-screen experience support, and more. However, it also introduces a frustrating problem: a white flash when opening File Explorer in dark mode. This flash is a brief, 1-second white screen that can be particularly jarring in dark environments, potentially causing eye strain for prolonged users of dark mode.
The issue is not limited to just the initial opening of File Explorer. It occurs every time the app is opened, whether you're navigating to the Home or Gallery, creating a new tab, turning the Details pane on or off, or selecting More details while copying files. This consistent flashing can be a significant distraction and a potential source of frustration for users.
Microsoft has also acknowledged a second problem with KB5071142: invisible login icons on the lock screen. Specifically, the password icon for switching between different login methods may not be visible, even though it's still present. To resolve this, users must hover over the space where the icon should appear to reveal the password button, which then opens the password text box for input.
The company is aware of these issues and is working on a fix. However, there are currently no solutions available for users who have already installed KB5071142 outside of rolling back the update. It's concerning that such significant problems can slip through the cracks and be included in a public-facing Windows update without prior testing through the Windows Insider Preview program.
Despite these issues, KB5071142 offers numerous quality-of-life improvements and new features, such as an updated haptic motor engine that vibrates peripherals like pens when snapping windows and hovering over app controls. The update also includes a cleaner, easier-to-navigate context menu in File Explorer and other general OS enhancements.
For now, users who prefer dark mode are advised to wait for Microsoft's fix before installing the update. The company encourages users to share their thoughts on KB5071142 in the comments, fostering a community discussion around these issues.
