On the primary site server, again make sure you have following components available.
1. Make sure you have x64 Windows server 2008 Operating System
2. Install supported version of SQL server 2008 (for Configuration Manager 2012 RC you must have SQL 2008 SP2 with CU6)
3. Extend the Active Directory Schema with Schema Administrator’s rights ( <CM2012RCMedia>\SMSSETUP\BIN\I386\extadsch.exe)
4. Install .Net Framework 4.0 Continue reading