How to fix unzip error “End-of-central-directory signature not found”

If you are unable to extract files from a zip file and instead getting the error “End-of-central-directory signature not found”, changes are that the zip file was incompletely downloaded or got corrupted on your disk somehow. This tutorial discusses how to fix, or at least get round, the unzip error when a zip file is corrupted or end of the file is truncated.