This is something I've had people ask me before and message me about, how do you get Windows on an MC-32. The Kimsufi templates don't appear to have the ethernet driver in them, and I have tried to do this over KVM IP on a MC-32 as well and Windows by default doesn't have this.
There is an easy way to get Windows 8.1 Pro on one of these machines for free. First, visit https://technet.microsoft.com/en-us/library/jj612867(v=ws.11).aspx and find the Windows 8.1 Pro KMS product key, it's at the top of the "Windows Server 2012 R2 and Windows 8.1" table. This is 100% legal and that is a Microsoft website, keep in mind Windows will remain unactivated and put a watermark in the corner of your screen.
Copy the KMS activation key for 8.1 Pro, then log into your SoYouStart Manager and click on Licenses
Then in the left hand side of the screen click on "Add an SPLA license" and select your server from the dropdown list, then for version type select "OS Windows SPLA license" from the bottom of the list, then paste the KMS product key for 8.1 Pro you got from the microsoft technet website listed above, then click on "Confirm", and then "Back to the dashboard", it has been added to the list.
Now go back to the server page and click on "reinstall", in the OS list under "Select your template" scroll all the way down to the bottom and select "Windows Client 8.1 PRO 64bits (InstallV2) (64bits)", then press next, on the next screen at the bottom you will see a checkbox that says "Use your windows SPLA license", tick the check box and click on "Confirm". Note that if you do not click the checkbox the install will fail as windows needs a product key to continue, and the KMS technet product key will get the windows install finished, it won't activate it however.
Now wait for around an hour or 2, you then will recieve an email from OVH with the user account details to login to. I would recommend uninstalling CopSSH when you login as that been linked to some vulnerabilities in the past with people being able to login with a "default password", then changing your Windows password.