trouble with install

I have just got a computer with windows 10 on. I previously had all my CAD software on windows 7. I have had to upgrade as my old computer died. my problem is I have 1 possibly 2 programs that I cant even install from windows 8 and 10. I am not sure what options I have? the catch is that the program is needed to run in the background by other programs to run.

some one has mentioned a virtual pc/drive. I am unfamiliar with this product tho. and don't know what options I have. ideally id like to get the same setup on my two machines windows 8 and 10 but at the moment either one will be amazing. the software supplier has confirmed there product wont work on 10 and 8 and that was as far as they went!! I have tried backdating it in properties but get errors even as I install it.

Purchase Windows 7 and install that in a dual boot configuration? Hopefully the new computer hardware is not so new that you can't find drivers that will work with Windows 7 for it.

Thank for the reply.
Can a program running on say Windows 10 talk/reference a program running on 7 if I dual boot? One of my cad programs uses measuring equipment that needs one program to talk to the other to give it the sizes.

The only way I can think that would be possible is if either the Windows 10 or Windows 7 was running as a virtual machine under the opposite operating system, but I have very limited knowledge of if that could work or not. You might want to ask that question under the Virtualization subforum.