By Sergiu Gatlan
Publication Date: 2025-12-02 13:39:00
Microsoft has confirmed that the KB5070311 preview update is triggering bright white flashes when launching the File Explorer in dark mode on Windows 11 systems.
“After installing KB5070311, you might experience issues when opening File Explorer in dark mode. The window might briefly display a blank white screen before loading files and folders,” Microsoft says in a Monday support document.
The bug is also triggered when navigating to or from Home or Gallery (including launching to Home), creating a new tab, toggling the Details pane on or off, and selecting ‘More details’ while copying files.
Microsoft is now working on a solution but hasn’t provided a timeline for the fix. Until a fix rolls out, affected users are advised to switch off dark mode to avoid getting flash-banged when launching File Explorer or creating new tabs.
The fact that Microsoft hasn’t caught and fixed this bug before releasing the KB5070311 optional update is quite surprising, given that it also…
