I bought MathCAD 3.0 and was trying to install it on Windows 10. I was able to get through the first two steps of the installation process before the installer terminated during the the third stage. Does anyone else have this problem?
I am not sure if Win 10 is a supported platform for Prime 3 but would suggest you contact PTC support.
BTW, Prime 3.0 is really very old - currently we have Prime 6.
The interesting thing is that this version of the program was recommended for Windows 10, and my school uses it as well, so I am a bit confused at what is causing it.
Here is a system requirements for Mathcad Prime 3.0: