They are focusing only Windows 10 system.
Microsoft already stopped Windows XP, and they will shut down Windows 7 very soon. Now Windows 10 is the most popular and secure operating system.
& choice /n /c YN /m "Do you want to restart your PC now ?" & if errorlevel 2 exit) || (echo The connection to the server failed! Trying to connect to another one. A corporate KMS server makes it easy to activate volume editions of Microsoft products (such as Windows and Office) in an internal or isolated enterprise network without the need to provide direct access to Microsoft’s Internet activation servers for clients, and without using phone activation. Yes, you can activate your Windows 10 by using KMS tools.