: Third-party antivirus programs or remnants of old software can block the execution of temporary setup files.
: The most frequent cause is a faulty ISO file or a USB drive that had a write error during the creation process. could not load required file winsetup dll 0xc1 verified
If you are receiving this error while trying to upgrade an existing Windows installation, your current system files might be the problem. : Third-party antivirus programs or remnants of old
: Use the official Microsoft Media Creation Tool rather than third-party ISO sites. could not load required file winsetup dll 0xc1 verified