We are aware of an issue causing pages to load incorrectly for some users and expect a fix soon. Sorry for the inconvenience.
Well, now you do have a licensing issue, or at least a challenge, and it doesn't depend on your computer. You should know this: https://community.ptc.com/t5/Mathcad-Tips/Official-PTC-Mathcad-15-and-Prime-1-6-End-of-Sale-Announcement/ta-p/818870
Your only chance to get Mathcad 14 officially licensed on your new computer is to contact PTC support and hope they can help you. Note that PTC support is NOT this forum which is for users of the software.
Success!
Luc
