Setup has detected that the installation of Reporting Services is not correctly configured or no instance of Reporting Services is linked to MSSQLSERVER, installing Microsoft DPM

Problem: 

Error: Setup has detected that the installation of Reporting Services is not correctly configured or no instance of Reporting Services is linked to MSSQLSERVER of SQL Server.

I was trying to install Microsoft System Center Data Protection Manager 2012 SP1 and connect it to a newly setup remote SQL 2012 server and received an error about the Reporting Services not being properly linked to the SQL 2012 server.

Solution: I wasted a good few hours on this, trying to reconfigure reporting servers with no progress. I finally stumbled upon this post of the exact same error. Thanks to user RH_Av for his helpful post.

My error was assuming that the DPM install would be smart enough to know that the default instance should be used, and that it has reporting services installed and configured.

The solution was to enter the SERVERNAME/INSTANCE, not just the SERVERNAME. I despise stupid things, and this was something Microsoft should fix. It should always check the default SQL instance. duh. Anyways, problem solved!