Many websites offer ready-made "MS Office 2019 Portable" ZIP files. Examples include PortableApps.com forums (user-uploaded) or torrent sites. To use:
Crucial Warning: Pre-made portables are the #1 vehicle for malware. Before running any, upload the .exe to VirusTotal.com. If more than 3 engines flag it as a trojan or keylogger, delete it immediately.
This is the biggest selling point. You bypass the sometimes lengthy installation process and the need for administrator privileges. It works perfectly for students using library computers or employees using shared workstations.
We promised a long, honest article. So here is the final takeaway.