The companies and individuals distributing these "portable" versions are not doing you a favor; they are either compromising your security with malware or providing an unstable, legally gray product that will ultimately cause you more problems than it solves.
Portable software applications are highly appealing in modern workplaces. The promise of "Office 2013 Portable"—a version of Microsoft Word, Excel, and PowerPoint that runs directly from a USB drive without installation—sounds like the perfect solution for users seeking flexibility. However, these unofficial packages carry severe security, legal, and operational risks. Office 2013 Portable Word Excel Powerpoint -
Whether you will have a while working?
To run Office 2013 Portable, you'll need: Important Considerations and Safety
If you want to explore the best setups for mobile productivity, let me know: these unofficial packages carry severe security
The Risks and Realities of Office 2013 Portable (Word, Excel, PowerPoint)
Ideal for secure environments where you cannot install software. Important Considerations and Safety