The brief article linked doesn't really give a coherent story, so it will take some investigating to find out what, if anything, it really means.

Since earlier Windows versions were subject to different rules that specifically allowed transfer (but not copying) to another system, and since all these earlier ones are obsolete and unsupported, it would appear that only WinXP and possibly some server OS versions could be affected.

Guest dopfer - for WinXP, the EULA has always stated that the OS is licensed to one specific computer and cannot be transfered to another computer. This was a fundamental change to the concept of "what kind of property" the OS is, and to who "owns" it, but it's been that way, for WinXP, since day one.

John