Mohammed bought a Windows 8 machine, but he hates it and wants to return it. Leo says that Start8 is $5 from Stardock and it gives Windows 8 the start menu. So there really isn't a need to return it.
He also wants to know if he can install older Windows 7 software on it. Leo says that there shouldn't be any problem with that. All Windows 7 apps should work just fine. Worst case scenario, he'd have to try compatibility mode. Mohammed may have to deactivate the software on the older machine and activate it on Windows 8 with some of his software.