Again, and as always, please do remember to enter those discount codes when checking out to ensure that you get the very best price on offer.
How to use your license key when it arrives:
After payment, the buyer receives an OEM product key to the email specified during registration, which can be activated directly in the Windows 10 system itself.
Head to Start > Settings > System > About the program > Change product key (in this menu you need to enter the received OEM key). The operating system itself, by the way, can be downloaded from the official Microsoft website.