I am the one that edit the title as it was, (not make roll back).
The one and only reason that I do it, is because google make this question appear first on google search for this error.
I know that Code Caster try to make it better, base on the answer, and it did do it better, but better for one that know what the 500 error is.
Most did not know that this is a general error, so search what was previous on the title, and not what Code Caster add.
In any case, my intentions are only to help, and as the answer have get many votes, and the question get many hits, I believe that must stay as it was... but ok, if others here believe different, I follow.
In the end I am see the results, if the answer get many hits, "its works" - and something that works, I do not change it.
Now about that title
"How to find the underlying cause for an HTTP 500 - Internal server error in IIS?"
This is the issue for me, that people that get the "HTTP 500" error, did not realize at first that this is a general error - but this title is refer to a person that all ready know the answer.
And now what ? (from the question)
From the moment that the question is not of him, and some one (me) change the title back I say that is better accept the community, this is the community, to be able to accept what other say together with him.
The important here is that he can not accept the fact that some one do, what the same did the same moment. And now what ? move on....