: Right-click setup.exe and select "Run as administrator" to avoid permission issues.
: Existing customers with an active support contract can log in to the PTC Support Site to download older media and documentation. Mathcad Prime License : Users with a valid subscription to Mathcad Prime 7 mathcad 15 install download
If you obtained a trial installer, use the trial license key provided by PTC. Note that trials cannot be extended. : Right-click setup