Can't install Visual Studio Community Edition 2013

Question

I can't install the Community Edition 2013 of Visual Studio. I always get the following error message:

Visual Studio Professional 2013 is currently installed on this machine. 
Please uninstall Visual Studio Professional 2013 and retry.

The problem here is that I never installed Visual Studio Professional 2013. I installed Visual Studio Express 2013 and I uninstalled it because it didn't want to start up. So why is it telling me such nonsense? Even when I search for Visual Studio I can't find anything on my computer.

How can I install the Community Edition?

Answer 1

Check registry for this key "SOFTWARE\Microsoft\DevDiv\vs\Servicing\12.0\professional". If present remove it. Then install Community Edition.

Answer 2

Also check registry key HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\DevDiv\vs\Servicing\12.0

Answer 3

Or when in doubt, delete everything! I found that deleting the DevDiv folder in the registry fixed the solution.