If a file claims to be 5GB compressed to 50MB, it is mathematically impossible. You are either downloading a downloader, a virus, or a broken installer.
: Using unauthorized versions of Microsoft Office is a violation of copyright law, which can lead to legal penalties or fines. Performance and Updates upd download microsoft office highly compressed
Avoid using "activators" or "highly compressed" ISO files from unofficial forums. Support for older versions like Office 2016 Office 2019 If a file claims to be 5GB compressed