Visio 2007 was designed for Windows XP and Windows Vista. Forcing a modified, portable version to run on modern operating systems like Windows 10 or Windows 11 often causes frequent crashes, registry errors, and corrupted save files. Free and Safe Alternatives to Visio 2007
After researching, I found a few verified sources that offer a portable version of Visio 2007: visio 2007 portable verified
A completely free, open-source diagramming tool that integrates seamlessly with Google Drive, OneDrive, and local storage. It reads and writes standard vector formats and requires no installation. Visio 2007 was designed for Windows XP and Windows Vista