The best place to buy Windows 11/10 is from ... since you have the key, its best to use it. Lastly, if you already have any of these versions, especially Home, and you wish to upgrade to Pro ...

Once installed, you can go to the activation section, and then decide to buy a product key. The cost is usually $199 for Windows Pro and $139 for Windows Home. Unlike Windows 11/10 Pro and Home ...