How to install Microsoft Office on Windows 10 VM

I'm running a Windows 7 and a Windows 10 VM on my MAC desktop. The Windows 10 is a paid application not the free DL.
I want to install Office 2003 on the Windows 10 VM but every time I try to install it (either DVD or Zip) Windows 7 VM opens and
it tries to install it there. Windows 7 is shut down when I'm trying this.
Yes, I originally had Office 203 installed on the Windows 7 side but I since uninstalled it.
I could totally remove the Windows 7 VM but for now I would like to keep it.
Any suggestions as to why Office 2003 will not install on my Windows 10 VM would be greatly appreciated.
Note: I do have Office 2003 installed on two different PC running Windows 10, no problems.

 

Hi, please try this article