You're not alone. Read here: https://community.ptc.com/t5/Mathcad-Installation/reloading-Mathcad-in-new-windows-11-computer/m-p/1029415#M4744
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Luc
Hi @SN_4901517,
I wanted to see if you got the help you needed.
If so, please mark the appropriate reply as the Accepted Solution or please feel free to detail in a reply what has helped you and mark it as the Accepted Solution. It will help other members who may have the same question.
Of course, if you have more to share on your issue, please pursue the conversation.
Thanks,