How can you run software on one computer in multiple copies if it is only meant to run in one copy?

Question

Windows

How can you run software on one computer in multiple copies if it is only meant to run in one copy?
It is desirable without virtual machines, so that resources are spent only on one Windu.

Answer 1

With the help of a virtual machine. VirtualBox, VMWare, etc.

Answer 2

One technique to prevent a second copy from starting is to create a file (a variation inside the swap), another is to search for a window by WindowClassName. In any case, you can "hack" the program so that it looks for the wrong name and does not find it.