In our Store, you can purchase an original Windows Server license key that will activate your PC. We promised the key is 100% valid. The Standard version of Windows Server 2016 costs $129.99, while the Datacenter version costs $149.99. The product key will be in the confirmation email you received after buying it. It’s a 25-character code, and it will immediately activate your current copy of Windows Server 2016 or Windows Server 2012 R2 installation.