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Microsoft: KB5070311 Triggers File Explorer White Flash in Dark Mode

The KB5070311 update causes white flashes in File Explorer's dark mode during common actions, with Microsoft advising users to disable dark mode until a fix is released.

  • On Monday, Microsoft confirmed the KB5070311 preview update triggers bright white flashes when opening File Explorer in dark mode, warning users the window might briefly display a blank white screen.
  • The preview update refreshed copy, move, and delete dialogs in default and expanded views, and updated progress bars and charts to match dark mode updates.
  • When users perform routine actions like navigating Home or Gallery, creating tabs, toggling the Details pane, or selecting 'More details' during file copy, affected windows briefly flash white, which users liken to a 'flash bang' in dark mode.
  • Until Microsoft issues a repair, affected users are advised to switch off dark mode to avoid the white-flash effect, and Microsoft says it is working on a fix without providing a timeline.
  • Beyond the dark-mode bug, KB5070311 also fixed explorer.exe and taskbar hangs after notifications, resolved File Explorer search failures on some SMB shares, and followed last month’s preload feature testing.
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11 Articles

Microsoft has just deployed an update of Windows 11 that is supposed to improve dark mode. But don't expect too much, as it causes a blinding white flash every time the File Explorer opens.

By trying to perfect the dark mode, Microsoft ironically introduced a bug into the Windows 11 File Explorer, transforming the window opening into a kind of white flash.

The latest Windows 11 update is supposed to significantly improve dark mode in File Explorer. The problem: it causes a bug in the display of dark mode in the same Explorer. [Read more] Want to find the best Frandroid articles on Google News? You can follow Frandroid on Google News with one click.

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Windows Latest broke the news in on Monday, December 1, 2025.
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