iTunes Error 7 – “iTunes was not installed properly. Please reinstall iTunes”

I tried to load up iTunes this morning so that I could put some music on to my iPhone and I was  greeted with a friendly error message:

iTunes was not installed properly. Please reinstall iTunes

This was accompanied by “error 7″. After searching for a while and finding a number of different possible solutions, I remembered that I had un-installed QuickTime and installed QuickTime Alternative (http://www.free-codecs.com/download/quicktime_alternative.htm). I don’t like QuickTime and apparently you can make iTunes work without QuickTime as long as you install QTA. Apparently it doesn’t work.

So, all I had to do was re-install Quicktime and everything was fine again!