Standard software installs files into your system’s Registry and Program Files folder. It leaves traces, requires admin rights, and is tethered to that specific PC.
He turned to his last resort: a USB drive given to him by a "tech-savvy" friend who operated in the grey areas of the internet. Office 2013 Portable Word Excel Powerpoint -
If you must use an older portable version, run it inside a Windows Sandbox or a Virtual Machine disconnected from your main network. requires admin rights
You might wonder: Why not Office 365 or Office 2021? Office 2013 Portable Word Excel Powerpoint -