The file "Microsoft Office Visio 2003 Portable.rar" is highly likely to be unsafe, unlicenced, and potentially malicious. Microsoft officially ended support for the Office 2003 suite in 2014, and "portable" versions of paid software are typically unofficial, cracked versions distributed through untrusted third-party channels. Critical Safety & Security Report
What is Microsoft Office Visio 2003?
.vsd files without editing..vsd)..vsdx..rar using 7-Zip or WinRAR (password often in forum post).Visio_Portable.exe or Launcher.exe.