This product cannot be used to upgrade your system from another version!If you encounter any issues during activation, please follow these steps:

Open Start menu, type SLUI 04 and press enter,
Select your country, and call the toll-free number. Follow the instructions provided by the automated activation system to receive a confirmation ID and activate your OS.

You can also click here to check out an illustrated guide of this activation method.
We are aware that this installation procedure might be confusing and that's why we have implemented a new Windows bot which will assist you with the most common issues!You can try it out by visiting our LiveChat and picking Windows - activation issues from the list of topics.
The system can be downloaded from the official source or from the 3rd party website.