of Visio 2010. Most "portable" versions found online are created via thin-app virtualization

While portable versions of software are convenient, ensuring your software is genuine and secure is crucial. Always weigh the convenience of a portable version against the potential risks and consider official solutions or reputable alternatives.

A clean version is typically between 300MB and 600MB.

A legitimate, functional Visio 2010 Portable should be fairly large (usually between compressed).

If you decide to proceed, do not just click the first link you see on a file-sharing site. Follow these best practices to find a clean, working version.