Hello Sandro. Thanks for your reply.

Finally I got the Classic installer and it installed fine.

I think I have problems with my environment. I installed first WebMatrix because I use Umbraco. Then I installed Visual Studio 2013 for Web. Both of them uses IIS Express and was working fine. Then I wanted to install Kentico, but I wanted it in a IIS full, so I added the IIS Windows components. When I tried to install Kentico, it was showing again and again the error mentioned above. By my own, i made the dummy asp.net page, and it was not working at all... even the plain HTML pages were not being served. I changed ports, stopped and restarted again the IIS Service, and finally I gave up when was able to download the classic installer for Kentico 7.

What was funny is that after installed, it didn't worked using the IIS full. So, I opened the kentico solution in Visual Studio 2013 and started it to use IIS Express in the random port that it assigns automatically and voila... after a couple of adjustments (.NET framework version and a key in the app settings in Web.Config) it started to work nicely, created the database and it was up and running as expected.

But the IIS isn't working yet... everyting delivers empty response, but when invoking the Kentico Default.aspx page, it shows a 500 error. So I am kinda confused, because it is actually doing something, but the log is not recording any entry.

Any idea about what could it be happening?

Thanks again.