A Motherboard Like Image appeared on the Bottom of My Screen

[Windows 11]

Dear Community, today after logging into my computer a Motherboard like image with lots of indicators blinking and a Triangle Shape in the Middle appeared on the bottom of my screen and it was showing Press Spacebar with a Big Spacebar Key icon in the middle bottom and an Esc Button with a Small Esc Icon in Bottom left Corner and i pressed on Spacebar it bought up a Ring of Indicators Blinking and then disappeared suddenly. please let me know what it was.

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