ABBYY offers a for enterprise customers. This is a physical USB dongle that authorizes the software on any PC it is plugged into.
But what exactly is the "Portable" version? Is it an official release? What are the risks and benefits? And most importantly, how does it compare to the standard installation? Abbyy Finereader 15 Portable
If you need portability without breaking the law or infecting your PC, you have several excellent (and legal) options. ABBYY offers a for enterprise customers
If you strictly need a portable EXE, consider these legal, open-source options: Is it an official release
In software terminology, a "portable" application is designed to run directly from a USB flash drive or an external hard drive without needing a formal installation process on the host computer. Ideally, it leaves no configuration files, registry entries, or traces on the machine it runs on.