When Windows 10 boots up from a fresh install, it will ask you for a product key and this isn't the Windows 7 or Windows 8 key of your original OS - at least mine didn't work - it's one for ...

Your Windows 10 product key may be necessary to unlock all features -- but it's not easy to find. Here's where to look for the product key (even if it's lost).

Product key and activation with Windows 10 free upgrade: When you upgrade your PC to Windows 10 from Windows 8 or 7, your licence will be tied to the hardware upgrade, not to the Microsoft account.

Windows product keys are almost (but not quite) a thing of the past. With Windows 10, Microsoft has rewritten the rules for how it performs product activation on retail upgrades of Windows ...

Click on Install now to proceed. The next screen will ask you to enter the Windows 10 product key, if you have purchased a product key, now is the time to enter it.

Can't find Windows 10 product key on your computer? Here are three easy ways to find your Windows 10 product key.

In spite of the official end of the free Windows 10 update offer on July 29, it seems any valid Windows 7/8.x retail product key still installs Windows 10 for now.