: Ensure all downloaded parts (part01 through the final part) are in the same folder.
Multi-part archives (like part01.rar , part02.rar , etc.) work as a single unit. You do not need to extract each one individually.
Follow the installation prompts. It is often recommended to install the game to a short directory path (e.g., C:\Games\CoD_WWII ) to avoid file path length errors.