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  1. My computer works perfectly in Normal Mode.
  2. When I try to boot into Safe Mode, I am greeted with BSOD and the stop code "UNSUPPORTED_PROCESSOR". The computer then reboots itself into Normal Mode again.

The processor is an Intel i7-8700K. How do I start debugging this? I would like to boot into Safe Mode to delete some drivers that are always in use in Normal Mode.

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1 Answers1

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Updating my BIOS fixed this for me. In my case Safe Boot was not working with ASRock Z370 Killer SLI/ac BIOS version 3.30, but it does work with version 4.30. I know that Windows uses a newer version of microcode for the i7-8700K than the BIOS version 3.30 that I was using. Perhaps Normal Mode is able to handle an older microcode from the BIOS where Safe Mode is not ‍♂️

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