Many users while using the previous version of Windows 8.1, 8 or 7 used to back up the activation after successfully activating their copy of Windows operating system.
The fundamental benefit of backing up the copy of Windows 10 is that it makes it easier to reactivate Windows after you’ve performed a clean install or reinstall of Windows.
How backing up Windows activation works?
When you activate copy of Windows 7, Windows 8 or Windows 8.1, Windows will store the activation information in a system file. The Windows activation backup tools backup this file and allow you restore the same file when you perform a clean install or reinstall of Windows.
Is it possible to back up Windows 10 activation?
The bad thing is that tools who support backing up Windows 7/8/8.1 don’t support Windows 10 so there is no way to back up Windows 10 activation.
The good thing is that you don’t need to backup Windows 10 activation if you have upgraded from Windows 7/8/8.1 or if you performed a clean install of Windows 10 and activated your Windows 10 copy using Windows8.1/8/7 product key.
When you upgrade to Windows 10 using the free upgrade and successfully activate Windows 10 or when you activate Windows 10 using Windows 8.1/8/7 product key, Microsoft gives a digital entitlement to your PC. The same entitlement will be used when you will reactivate your Windows after a clean install or reinstall.
However if your copy of Window 10 is not automatically upgraded you can contact Microsoft support team to get your copy activated. In some cases, Microsoft support team might need to access your PC in order to make sure your PC was running an activated copy of Windows 10 before the clean install or reinstall.
When you perform a clean install of retail copy of Windows 10 and successfully activate it using a valid key, Microsoft will not give a digital entitlement to your PC which means you will need to enter a valid product key when you perform a clean install or reinstall of Windows 10 in order to activate your copy. So we recommend you store your retail key in a safe place just in case if you need it in future.
To say this in a nutshell, there is no way to back up your Windows 10 activation and the backing up is not required if you have upgraded by using the free update program.