Detecting Windows boot-up state using GetSystemMetrics function

Using GetSystemMetrics function, we can detect how the system is started.

function WindowsStartUpState: string;
begin
  case (GetSystemMetrics(SM_CLEANBOOT)) of
    0: Result := 'Normal boot';
    1: Result := 'Fail-safe boot';
    2: Result := 'Fail-safe with network boot';
  else
    Result := 'Unknown state';
  end;
end;

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