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On the HP Windows 10 computer, a flickering horizontal bar is created across the screen in part of the taskbar, and only in this location. It started suddenly after a software update. I tried resetting the computer and the problem was not solved. Also, updates were made that did not help to solve the problem. There is a faulty device called detection verification but it hasn't caused any problems so far. I performed tests to diagnose the fault and everything was found to be normal. But the screen is flickering. What is the source of the problem? Is it a graphics card? The screen itself? A device? How can you know?

thanks.

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