Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
I do not recall resetting my startup, HP All-In-One 21-2020 running windows 10
Please include the screen info. This would be helpful.
What happens when you select "F1". F1 is system information.
I would say you have a hardware problem. Try running HP diagnostics if possible.
Start the PC. Tap "ESC". Select "F2".
Run system and component tests.
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