This is a font registration bug. Copy these fonts from an older Windows 7/8 machine or a trusted online backup:
Mathcad 14 was originally designed for older operating systems like Windows XP and Vista. On Windows 11, you may encounter several obstacles: mathcad 14 windows 11
After installation:
: If direct installation fails, running it within a Windows 7 virtual machine (e.g., via VirtualBox) is the most stable workaround. versus the latest Mathcad Prime versions to see if upgrading is right for you? This is a font registration bug