How to fix Windows 11 PC black screen with solid white horizontal bar at boot up?

P

PKipp

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I used my windows 11 computer last night no problem. I started an update during shut down as I went to bed. This morning, when booting up my PC, I get a black screen with solid white horizontal bar at upper left of my hdmi screen.To troubleshoot, I have restarted several times including powering off the PSU switch completely. Tried mashing F2 or the Delete key on boot up. Checked that my motherboard debugging LEDs are not showing any errors. What do I do?

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