: The ISO file or bootable USB you are using likely contains a damaged version of winsetup.dll . This often happens if the download was interrupted or the media creation tool failed during the "verify" stage.
If you’ve tried all the steps above and still see the error, your best bet is the in-place upgrade repair or a clean Windows installation. Always back up your important data before attempting major system repairs. could not load required file winsetup dll 0xc1 verified