Traditional software (like standard Office 2007) writes hundreds of entries into the Windows Registry, copies DLL files to System32 folders, and ties itself to a specific machine. If you try to move it to a USB drive, it will crash instantly.
Office 2007 was a masterpiece of its time. It brought the Ribbon to the masses and killed the File menu. But it is now an antique. Using it today is like driving a 2007 car without airbags, anti-lock brakes, or seatbelts—sure, it might start, but one crash (malware infection) ruins everything. Microsoft Office 2007 Portable Download
Every single "Office 2007 Portable" installer available on torrent sites, file-sharing forums, or YouTube descriptions is a . These repacks are created using "application virtualization" tools like: copies DLL files to System32 folders