Full, official and legal version of the software - download directly from Microsoft and authenticate online.
We have two versions available - retail version that comes directly from Microsoft with all features unlocked and the OEM version which is the version provided by large PC manufacturers on devices they sell. The OEM is limited - it permanently binds to one PC on first activation, it does not come with Microsofts free phone support and you can't use it to upgrade from older version of windows - only fresh install. The retail version does not come with those 3 restrictions but other than this it's exactly the same product.
The OEM version is limited - it permanently binds to one PC on first activation, it does not come with Microsofts free phone support and you can't use it to upgrade from other Windows editions - only fresh install. We recommend purchasing the retail version that is free of any restrictions, especially if plan to upgrade or change your PC later and still use our key.