: This usually happens if you are using an "Upgrade" key on a drive that doesn't have a previous version of Windows installed.
A product key is a unique code used to verify that your copy of Windows is genuine. It typically follows this format: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX . windows-8-1-product-key-with-activation-guide-32bit-64bit
: Ensure you are connected to the web for "Method 1" to work instantly. : This usually happens if you are using