Generating a Hardware-ID on Windows

Question

What is the best way to generate a unique hardware ID on Microsoft Windows with C++ that is not easily spoofable (with for example changing the MAC Address)?

Answer 1

There are various IDs assigned to hardware that can be read and combined to form a machine key. For example, you could get the ID of the hard drive where the software is stored, the proc ID, etc. Some of these can be set more easily than others, but part of the strength is in combining multiple pieces together that are not necessarily strong enough by themselves.