Microsoft Visio 2003 is over two decades old. When you see a "free portable download" for software that originally required a paid license, you are likely encountering several issues:
If you’d like, I can:
:While not an official Microsoft site, the Internet Archive hosts ISO images of various Visio 2003 editions (Professional and Standard) uploaded by users for preservation. Step 1 : Search the archive for "Microsoft Visio 2003." Step 2 : Download the ISO file. microsoft office visio 2003 free portable download