Buy file ?
Buy file at https://iso.quanlyvps.com/
Installation of windows via their KVM over IP ?
To install Windows using your own media and license key, you must install from your own media using KVM. (Remember this option does not show up until you have installed an OS. So just install Debian first, and then complete you will find the option.)
On the KVM website select Remote Control | Console Redirection | Launch Console. (This will use a JAVA Viewer) ! Download java at https://java.com
Log into your Online.net Control Panel
Once you have logged in, you will need to navigate to your server list (Login –> Server –> Server List)
Choose “Manage” to the right of your dedicated server in the list.
Choose “KVM OVER IP”
You can choose file ISO at https://virtualmedia.online.net/