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Microsoft has issued a fix for a bug in Windows 10 2004 which has caused some users to have a non-functional external monitor when using some applications.
The bug, which showed up in June, caused external monitors to go back when drawing in some applications including Whiteboard and Microsoft Office.
It also caused an error to be raised in the Windows 10 Device Manager, with their graphics card being marked as having an issue.
The fix was released as part of KB4577063 with the changelog reading:
“If you have a device running Windows 10 version 2004 with a built-in screen (such as a laptop or tablet) and a connected external display set to Duplicate your primary screen, you might see both monitors flicker and the external monitor go black if you try to draw using an Office app (such as Word),” Microsoft said.
“This can also happen with some other apps capable of drawing, such as Whiteboard. If you check in Device Manager, your graphics controller will have a warning icon next to it (a yellow triangle with an exclamation mark in it).”
You can read more about the update and find download links at Microsoft here.