Downloading a pre-made "MS Office 2019 Portable" from an unknown source is one of the riskiest things you can do.
. Official versions of Office 2019 are strictly licensed for installation on a single PC or Mac and require a one-time purchase. The Reality of "Portable" Office 2019 Microsoft Office 2019 Portable Guide | PDF - Scribd ms office 2019 portable version no need to install