How to Fix Windows 10 Product Key Activation Not Working
When you installed or an upgrade version of Windows: wanted to reinstall version to upgrade, you had first to reinstall the qualifying version from which you upgraded, reactivate it, then upgrade again for again reactivate.
In Windows 10, there is no loger such case as window7, window8. Once you are upgraded to Windows 10 and activated, then it can simply create a bootable copy on DVD or USB and reinstall just Windows 10 without the need to reinstall the qualifying version, and it also be reactivate automatically. Windows 10 registers the device with the Product Activation Center and keeps a copy of your device’s activation in a Cloud Store. When you perform reinstall or clean introduce the establishment checks with Activation Server, identifies the one of a kind establishment ID and produces the approval for your device.