Third-party "portable" versions found online carry significant risks:
A "portable" app is typically a standalone executable that runs without installation, often from a USB drive. While convenient, using unofficial portable versions of Office LTSC 2021 carries significant risks: What's new in Office 2021 - Microsoft Support microsoft office ltsc pro plus 2021 portable
Third-party "portable" versions found online are unofficial, often modified to run without installation. Using these versions poses significant , including potential malware, lack of critical security updates, and potential licensing violations. including potential malware