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While using my HP EliteBook 850 with Windows 10, sometimes it appears that the Fn key status is inverted (pressed/unpressed) until i visit Keyboard Properties via All Tasks and test the repetition rate.

For example, typing "Fn key locked" results in "Fn 2ey 36c2ed".

Why does this happen, and how can i stop that? This page seems to recommend disabling the key in the BIOS, but i'd still like to control the volume and keyboard lights.

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For a bit it seemed Fn + Caps Lock enabled it and Ctrl+N disabled it, but now it's consistently Fn + num lk that toggles it. Only that latter part makes sense; i guess my laptop's overheating.

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