All HP computers and tablets shipped with Windows 10 will activate automatically when connected to the internet. If you install a different version of Windows 10, the system might need to reactivate Windows. There might also be situations when Windows requires reactivation even though the product has already been activated. The Product Key could be obtained by buying a retail kit from a store or online. When the new Product Key is entered, the system will reactivate using that new Product Key.
I could do this one year ago for Windows 7 but now I am not able to find the right place. Both telephone and Internet activation are rejected. With a volume licence, client's don't need to activate with Microsoft through the internet. Our engineers are working quickly to resolve the issue.
But note that a key can only be used on one PC at a time, so if you use that key for a new PC buildany other PC running that key is out of luck. Downsides of Using an Old Key When using an older Windows key windows 10 retail license activate Windows 10, you may run into complications if Microsoft isn't sure whether you're windows 10 retail license to update or not. But that seems to be happening less in recent months and years.
Transfer Windows 10 License to Another Computer