Since this error often stems from "bad bits" on your USB stick, the first step should be starting fresh.
: 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
: In some cases, the system’s registry has invalid paths for the Windows Installer services. Step-by-Step Solutions to Fix WinSetup.dll 0xC1 1. Recreate Your Installation Media Since this error often stems from "bad bits"
: Flash drives can develop bad sectors. Try a high-quality USB 3.0 drive. could not load required file winsetup dll 0xc1 verified