Krok 1: Otevřete cmd (spustit jako správce), then you type
dism /online /get-targeteditions
Krok 2: You copy and paste this code in cmd
If you want to upgrade to Windows Server 2012 R2 Standard zadáte:
dism /online /set-edice:serverstandard /productkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /accepteula
Poznámka:
pokud vidíte „upgrade se nezdařil“, restartujete Windows Server 2012 R2. It will upgrade Windows Server 2012 R2 Evaluation to Standard.