I facing issue when trying to install Cisco Security Manager in my Windows Server 2008.
I had attach the print screen of my server version and error message.
The error message had mention that it was due to unsupport OS or terminal service.
But, i check and it show that my Window Server was the recommend version and no terminal service been enable.
Please understand that Window Server 2008 R2 Enterprise Server is not same as Windows Server 2008 Enterprise Server. I had faced the same problem earlier. The R2 version is supported only CSM 4.1 onwards.