I have replaced my XP-Pro Sony laptop with a Windows 7 Toshiba Satellite. I have tried to re-install MathCad 13 on the Toshiba. It installs, and the Icon appears on the desk top, but nothing happens when I click on it. Windows 7 allows the use of XP-pro software, but MathCad will still not run. If I up-grade to MathCad 14 which is designed for Vista will it run on the Windows 7 OS?