Describing the steps that helped me in getting the solution since this is the first site that gets opened up while searching for this type of error 🙂

The summary.txt shows the following errors:

11.2.5548.0 No Yes

SQL Server 2012 UPGRADETO2012.INACTIVE MSSQL11.UPGRADETO2012 Database Engine Services 1033 Enterprise Edition: Core-based Licensing

It seems that the running the below command to remove the SQL feature might not ran properly resulting in making the Instance inactive

setup /q /action=uninstall /instanceid=UPGRADETO2012 /features=RS,SQLENGINE,FULLTEXT,REPLICATION

Seaching indepth on google took me to a link that describes the solution.

http://blogs.msdn.com/b/baliles/archive/2012/04/27/how-to-fix-a-failed-sql-2005-2008-r2-or-2012-install-upgrade-mssqlserver-inactive.aspx

Hope that helps.