I recently had this issue whilst trying to create a report in SCCM 2012. It seems this issue has manifested post SP1 install. 12/05/2014 Update
Tag: SP1
SCCM 2012 SP1 resets WSUS port to 80
Nothing like a service pack to fix all your problems, or in the case of SCCM 2012 SP1 create some new ones for you. After
Microsoft Remote Differential Compression (RDC) library must be registered for Configuration Manager site server installation error when upgrading to SCCM 2012 SP1
Here’s one I encountered the other day when attempting to upgrade SCCM 2012 to SP1. The RDC feature was installed on the Windows 2008 server