Visual Studio 2015 RC Community will not install, says it is already installed

Question

As the title implies, I am not able to install Visual Studio 2015 RC Community, and I keep getting the following errors. For the record, I am on Windows 8.1 Professional.

Answer 1

Found this tool that forcefully uninstalls everything related to Visual Studio 2013 and 2015. It did the trick for me.

VisualStudioUninstaller