As what may be the most common and convenient way to store and send multiple files, the ZIP file format is used by essentially everyone online. That being the case, there's a good chance you'll eventually come across one that has been corrupted, not least because only a single corrupt bit in one file out of dozens inside the ZIP could prevent your file archiver from opening or extracting its contents.

Corrupt files can result from a variety of issues including bad drive sectors, malware, an incomplete download or transfer such as during a drop in your connection, or any other sudden interruption like a power failure or an improper shut down while working with the ZIP file.