Nah, from the looks of the logs, you;re trying to install SEP11MR4 (just search for "11.0." within the logs to confirm), which doesn't support Win2k8r2.
I'd recommend downloading the latest version of the SEPM, either v11RU7MP3 or v12.1RU3. As Brian has said, IIS is only need for v11.0.*, and is not needed for v12.1.*
#EDIT#
Here are the general system requirements links:
http://www.symantec.com/docs/TECH163829
And those specifically for SEP11MR4:
http://www.symantec.com/docs/TECH91475