If your archive software (like WinRAR) says part02 is corrupt, try redownloading that specific file. Sometimes using a "Repair" function within WinRAR can fix minor header issues if a recovery record was included.
Because this file name is typically associated with third-party distribution sites, there isn't a single "post" to point to. However, here are the most common scenarios and how to handle them: WatchDogs2.part02.rar
If you are trying to extract the game, you must have all parts (e.g., part01, part02, part03, etc.) in the same folder. If even one is missing or corrupted, the extraction will fail. If your archive software (like WinRAR) says part02