Security Compliance Manager Install Issue

My issue stems from needing to set the MSS: settings under Group Policy Management for STIG compliance.

To do this a required install of the Security Compliance Manager is necessary. However upon downloading SCM 3.0 and 2.0 and attempting to install I am running into the issue where during the prerequisite checks it prompts a failure of Total Physical Memory.

More exact description of the error:

You are installing on Microsoft Windows NT 6.1.7601 Service Pack 1 with only 0 MB memory. Microsoft Security Compliance Manager requires at least 512MB of total physical memory.

The instance of windows I am attempting to install on is a new installation of Windows Server 2008 R2 SP1 and is not running as a VM.

Any ideas as to what my issue is?

Thanks for your time.

Ross