No, it is not safe. As detailed above, these files are a common source of malware and other security threats, and they are inherently unstable and illegal.

: Files from unverified sources may contain malware. Standard troubleshooting for installation errors often suggests disabling antivirus software, which increases the risk of infection.

A "portable" version of a program is a modified version designed to run directly from a USB drive, external hard drive, or a local folder without a traditional system installation. These versions do not write entries to the Windows Registry or create files in system folders, which theoretically allows them to be run on any compatible computer without leaving a trace.