If you are using an unauthorized portable copy on a work or school computer, you could face disciplinary action, legal liability, or even termination. Many organizations have strict IT security policies, and running unapproved portable executables is a fireable offense in sensitive environments.
Because "portable" cracks strip away the installer and registry dependencies, they are notoriously unstable. You may experience: visio 2007 portable verified
The moment you run an unverified portable executable from a random website, you are handing over control of your system. No diagram is worth that risk. If you are using an unauthorized portable copy
If you absolutely require the editing capabilities of Visio 2007 for legacy work, the safest route you could face disciplinary action