Get the analyzer from :-
http://www.microsoft.com/downloads/details.aspx?FamilyID=02d83950-c03d-454e-803b-96d1c1d5be24&displaylang=en
Before you run the VMCA, you must download the pre-requisite:- 64-bit version of Microsoft Baseline Configuration Analyzer (MBCA)
http://www.microsoft.com/downloads/details.aspx?FamilyId=DB70824D-ABAE-4A92-9AA2-1F43C0FA49B3&displaylang=en
The system will come out with a pop up error message if you did not install MBCA.
Run the tools and enter the server name.
The Analyzer will perform diagnostic and provide a report. It is recommended to fix all the error (Indicated in red color) before install SCVMM.
Re-run the diagnostic once you fix the red error. You can ignore the warning error (Indicated in yellow color about insufficient memory) .
Once the diagnostic is complete, you can start the SCVMM installation.