The Best Way To Uniquely Identify A Windows Machine

[rwiper]

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography

Find the key called “MachineGuid” this key is generated uniquely during the installation of Windows and it won’t change regardless of any hardware swap (apart from replacing the boot-able hard drive where the OS are installed on). That means if you want to keep tracking installation per OS this is another alternative. It won’t change unless you do a fresh reinstall of Windows.