At TransIP we are a big fan of open source. We therefore offer several open source operating systems for BladeVPS Pro. The ISO is automatically loaded for you, after which you can perform the installation yourself.
In addition to our open source offering, you can also run Windows Server on your BladeVPS Pro. This way you can login to your server via RDP from anywhere. From the control panel you can install Windows Server 2008 as well as Windows Server 2012.