Refer below link on how to locate the product code
How to Locate or Find Product Code for Single User and Student Edition of Mathcad
I have used the product code given, when I go through the activation process through the Mathcad software I am given an error message that my product code is not valid.
Please provide me with a valid product code to activate the software. The product code that I am using is:
Again through the activation process through the software, I am given an error message that the product code is invalid. See attachments.
You may have two network MAC addresses (Host-ID's) on the PC where you are trying to install Prime 7. One would be for LAN connection, the other for a WiFi connection.
Suggestion: Select the (or an) other Host-ID for licensing.