If you ignore the warnings and decide to download a portable version from a random forum, run these checks first:
While not free, ABBYY offers a for enterprise IT admins. Technically, an experienced user can extract the MSI and use command-line switches ( TARGETDIR=USB:\FineReader ) to install directly to removable media. This is complex but legal with a volume license. abbyy finereader 12 portable
Modern ABBYY products (now part of ABBYY Vantage) often move toward subscription models. FineReader 12 was a perpetual license. Users want to keep using what they paid for without "phone-home" activation every month. If you ignore the warnings and decide to