Q: While deploying System Center 2012 SP1 Service Manager Web Portal as a server, even with passing all the prerequisite tests, why does it fail on the final step of the installation configuring the SharePoint portal?
A: The exact error is shown below, and the cause is actually simple. The requirements for the Service Manager web portal are SharePoint Server 2010 with Service Pack 1. The error is most likely occuring because you don't have SharePoint Server 2010 SP1 installed. Install Service Pack 1 and the installation should complete without issue.