: Third-party "top" download sites offering older versions often package them with malware or invalid licenses. Autodesk warns that using unsupported software can lead to operational risks and data insecurity. Current Free Alternatives from Autodesk
Instead of chasing an unsafe 2015 crack, do this: autodesk inventor professional 2015 free download top
Technical Brief: Status of Autodesk Inventor Professional 2015 : Third-party "top" download sites offering older versions