Lets`s put your nonsense talk to rest from microsoft themselves.
http://www.microsoft.com/oem/en-gb/licensing/sblicensing/Pages/licensing_faq.aspx#fbid=7Xtbr41xker
System builder license section, 8th question down.
Can a PC with an OEM Windows operating system have its motherboard upgraded and keep the same licence? What if it was replaced because it was defective?
Answer
A. Generally, an end user can upgrade or replace all of the hardware components on a computer—except the motherboard—and still retain the licence for the original Microsoft OEM operating system software. If the motherboard is upgraded or replaced for reasons other than a defect, then a new computer has been created. Microsoft OEM operating system software cannot be transferred to the new computer, and the licence of new operating system software is required. If the motherboard is replaced because it is defective, you do not need to acquire a new operating system license for the PC as long as the replacement motherboard is the same make/model or the same manufacturer's replacement/equivalent, as defined by the manufacturer's warranty.
The reason for this licensing rule primarily relates to the End User Software Licence Terms and the support of the software covered by those terms. The End User Software Licence Terms are a set of usage rights granted to the end user by the computer manufacturer, and relate only to rights for that software as installed on that particular computer. The system builder is required to support the software on the original PC. Understanding that end users, over time, upgrade their PCs with different components, Microsoft needed to have one base component "left standing" that would still define the original PC. Since the motherboard contains the CPU and is the "heart and soul" of the PC, when the motherboard is replaced (for reasons other than defect) a new PC is essentially created. The original system builder did not manufacture this new PC, and therefore cannot be expected to support it.
