Server is Windows 2008 R2 I cannot connect using Windows Surface Pro. I can connect using Laptop with Windows 7. The surface Pro will see the IP address of the server and then request credentials. Credentials allways fails. On Windows 7 I enter just the user name and its appropriate password. No problem. Should I be using a different format on the Surface Pro?

Have you remembered to provide a computer or domain name before an account?

W2K8\Administrator

Any error messages prompted or shown under Event Viewer? Please paste related information here so we can better find the cause.

Meanwhile, you can refer to the KB below, check if it can help you

Remote Desktop disconnected or cant connect to remote computer or to Remote Desktop server (Terminal Server) that is running Windows Server 2008 R2

http://support.microsoft.com/kb/2477176/en-us

More detailed information would be very helpful

Regards