i see the video of F-Secure Internet Security 2012 it had good feture init not had compatibilty issue with server 2008r2
F-Secure Internet Security is not designed to be used on Windows Server!
If you want to test FS on Server sign in to "Email and Server Security Beta-Program"
For a server, why not use Linux? maybe Fedora or Centos is great. It's cost effecient too and more secure than Windows.
Just make sure to properly configure the firewall.