Error installing R2016b: archive is not a ZIP archive
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Walter Roberson on 18 May 2022
In current MATLAB versions, a downloader is used that downloads archives as required; when using the downloader, the error just might occur if you ran out of disk space during the download (but more common in that case would be an error about the magic number not matching.)
With older releases, there was no downloader program. Back then you would download a setup program, and you would download a series of archives. The archives were zip files, but it was important to not expand the zip. However, some people have their browsers configured to automatically expand zip files; that automatic expansion needs to be turned off while downloading the individual installation archives.