Windows stuck in Diagnostic Startup mode [Fix]
If your Windows PC is stuck in Diagnostic Startup mode, force Normal Boot via Command Prompt or disable PIN-only sign-in via ...
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Fix Windows Startup and Boot problems – Advanced Troubleshooting
It checks if there is a valid disk system to start the next phase. It’s indicated by an MBR or master boot record. The PreBoot process then starts the Windows Boot Manager. The job of Windows ...