Microsoft has confirmed that the KB5070311 preview replace is triggering shiny white flashes when launching the File Explorer in darkish mode on Home windows 11 techniques.
“After putting in KB5070311, you would possibly expertise points when opening File Explorer in darkish mode. The window would possibly briefly show a clean white display screen earlier than loading recordsdata and folders,” Microsoft says in a Monday help doc.
The bug can be triggered when navigating to or from House or Gallery (together with launching to House), creating a brand new tab, toggling the Particulars pane on or off, and choosing ‘Extra particulars’ whereas copying recordsdata.
Microsoft is now engaged on an answer however hasn’t supplied a timeline for the repair. Till a repair rolls out, affected customers are suggested to change off darkish mode to keep away from getting flash-banged when launching File Explorer or creating new tabs.
The truth that Microsoft hasn’t caught and glued this bug earlier than releasing the KB5070311 elective replace is sort of stunning, on condition that it additionally rolls out with what the corporate describes as a “extra constant darkish mode expertise.”
In line with Microsoft, the preview replace has refreshed the copy, transfer, and delete dialogs in each default and expanded views. Progress bars and charts now match the darkish theme for higher readability, and affirmation and error dialogs have been up to date for a constant look.
As BleepingComputer reported earlier as we speak, KB5070311 additionally addressed a bug inflicting the explorer.exe course of and the taskbar to cease responding after sure notifications.
With this replace, Microsoft additionally fastened a identified situation behind File Explorer search failures on some SMB (Server Message Block) shares after putting in latest Home windows updates.
In November, Microsoft confirmed one other essential bug that causes File Explorer, the Begin Menu, and different key system elements to crash when provisioning Home windows 11 24H2 gadgets with cumulative updates launched since July 2025.
Final month, it additionally introduced that it had began testing a brand new elective function that preloads the File Explorer within the background to enhance efficiency and launch occasions on Home windows 11 techniques.
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