CountMike :
Yes it does, two MBs already changed and activated using legal key From W7 Pro that vas bought as cheap update from Vista. All was retail, I never had an OEM computer or Windows since 3.0.
I get what you're saying.
I'm just reiterating what comes out of Microsoft:
https://answers.microsoft.com/en-us/windows/forum/windows_10-win_upgrade/reinstalling-windows-10-after-upgrade/578d0b7f-57e4-4893-b9d1-6cfac0d6290a?page=2&auth=1
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In fact you are using a key, but not for every subsequent install. Only for the first one.
In our case, the upgrade. The key comes from windows 7/8.
After the upgrade, your hardware ID is stored and Microsoft knows from that point forward that you are allowed to install Windows 10 on the computer with THAT hardware ID.
Hardware ID is somewhat flexible, so changing the hard drive or the video card won't require re-activation.
The installation ID that you are referring to is made of 2 parts: the product ID (which comes from the windows installation key) and the hardware ID. So really, the only "variable" part here is the hardware ID.
Read more details here:
http://www.gohacking.com/how-windows-product-activation-works/
Hardware ID – This value is derived based on the hardware configuration of your computer.
The WPA system checks the following 10 categories of the computer hardware to derive the Hardware ID:
Display Adapter
SCSI Adapter
IDE Adapter (effectively the motherboard)
Network Adapter (NIC) and its MAC Address
RAM Amount Range (i.e., 0-64mb, 64-128mb, etc.)
Processor Type
Processor Serial Number
Hard Drive Device
Hard Drive Volume Serial Number (VSN)
CD-ROM / CD-RW / DVD-ROM
What if I upgrade or make changes to my hardware?
In the above mentioned 10 categories of hardware, at least 7 should be the same. Thus you are allowed to make changes to not more than 3 categories of hardware. If you make too many changes then your activation will fail. In this case, it is necessary to contact the customer service representative via phone and explain about your problem. If he is convinced he may re-issue a new product key for your computer using which you can re-activate your Windows.
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So...it seems with a change of
only the motherboard, it works. Change a couple other things at the same time, it fails.