Sometimes when compressing files into ZIP or RAR format, something goes wrong and the files compress incompletely. Although it is possible to open an incomplete ZIP or RAR file, to do so requires the use of a software utility as a helper. The only way to extract, or open, an incomplete file is if it is not corrupted. If the files are corrupted, you cannot open them. Writer Bio

How Can I Open Incomplete ZIP or RAR Files  - 97