Mathcad Prime 7 doesn't start

Perhaps try a reinstall. 

 Hi,

Try the following tips:

• "Mathcad Prime does not launch after the initial splash on Windows OS": https://community.ptc.com/t5/Mathcad-Installation/Mathcad-Prime-does-not-launch-after-the-initial-splash-on/m-p/729884
• "Error "Mathcad application has stopped working" when launching Mathcad Prime x64-Bit version": https://community.ptc.com/t5/Mathcad-Installation/Error-quot-Mathcad-application-has-stopped-working-quot-when/m-p/706420#M23

Articles:

• "Mathcad Prime does not launch after the initial splash screen if Windows update KB4055002 for Microsoft .NET Framework 4.7.1 installed on the machine": https://www.ptc.com/en/support/article/cs277907
• "Upon launch a black and green rectangle appears, but the program window does not open for Mathcad Prime": https://www.ptc.com/en/support/article/cs338601
• "Error "An Unhandled exception occurred on the dispatcher thread. See C:\ProgramData\PTC\MathcadPrime\Logs\MathcadPrime_Exception_###.log" and Mathcad Prime fails to launch": https://www.ptc.com/en/support/article/cs34389