It appears you didn't try. I found over 90% of my old XP apps install and run without me doing anything.
You didn't give up the name of this CAD program so folk can't check for you. But you could google it in advance.
In the future supply enough detail for folk to avoid telling you to use google.
I have an $8000.00 CAD program (no longer supported) that runs on Win XP. The computer mother board has gone bad and as a result I need to move the program to a newer unit with Win 7, 8. 0r 10 as the OS. I do have the disks to reload the program, but do not know if it will run on the newer OS.
If it is not compatible with the new OS, is there a way of making the program think that the newer OS is Win XP?