If upgrading from within Windows, existing system files may be damaged.
If possible, use a high-quality USB 3.0 drive with at least 8GB of space. how to fix windows could not load required file winsetup.dll
If you are seeing this error during a fresh install, your USB or ISO is likely corrupted. If upgrading from within Windows, existing system files
Incorrect boot settings or disabled features like TPM can interfere with the setup. If upgrading from within Windows
Understanding why this happens can help you choose the right fix: