windows 10 activation

Hi all

when opgrading from win7/8 to win10 you dont need to activate the new win 10 as it accepts the licence from the older system.
As it is digitally recognized so no activaton is needed. My question is, is it from the hdd or the motherboard, microsoft recognizes
the digital activation. If its the hdd and the disk dies i will have to buy a new win10 licence

Thanks Davy
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davy999Asked:
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Cliff GaliherConnect With a Mentor Commented:
To properly answer the question, a bit of terminology clarification. You still activate windows. Always. What has changed here is not activation, but what Microsoft is calling a a "digital entitlement" that is associated with the machine, your Microsoft account, and the windows store.

As with previous versions of windows, activation is a combination of hardware as a whole that creates a unique signature. Older versions of windows checked if the product key had been used and what signature was associated. Now it also optionally checks digital entitlements stored in the Microsoft cloud instead of just product keys. If the signature matches, windows will activate. If the signature is too far off (a motherboard change will almost always do this, but so would a significant HDD change), you no longer match and the digital entitlement will not activate the new install.  

So don't think of this as a new form of activation. It really isn't. How *activation* works is pretty much the same as it has been going back to XP, when "genuine advantage" was a thing. What has evolved is how windows checks the validity for activation. A new option has simply been added to the mix.
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davy999Author Commented:
So a reformat of the hdd would not be affected ?
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nobusConnect With a Mentor Commented:
once the W10 was activated, the new install should accept the old activation data
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davy999Author Commented:
Thanks all
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McKnifeCommented:
I agree. One should note that MS claims, starting with the anniversary update, it is possible to reactivate after a hardware change using the activation troubleshooter, please read http://www.tenforums.com/tutorials/55383-activation-troubleshooter-use-windows-10-a.html
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