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Why can't I run Visual Studio on Port 80?

I have a solution that contains an ASP.NET website and several silverlight projects.  In order to allow these projects to work well together on deployment, I am trying to run Visual Studio on Port 80.  I had set my website to use a static port (80) and updated about half of the service references in the silverlight projects when Visual Studio froze.  Now I cannot run my website on Port 80 or import any service references unless I change the website to a dynamic port.  I get the error "Port 80 in use".  If I change to a different static port I get the same error for that port number.  I know these things are difficult to troubleshoot, but any ideas would be greatly appreciated.  

Note: I am not running IIS on my machine.  I have restarted VS and my machine several times.
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pureauto
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pureauto
1 Solution
 
Mohamed OsamaSenior IT ConsultantCommented:
are you sure IIS is not installed, as it certainly sounds like IIS or other webserver is binding to TCP 80
can you try to fire up http://localhost
let us see if there is any running websites, also something like TCPView should be able to tell you which application is listening on port 80 
 
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pureautoAuthor Commented:
I eventually found the solution here:

http://www.wahooga.com/index.php/2008/02/20/visual-studio-development-web-server-automatic-port-numbering-problem/

Turns out there was a conflict with ESET Antivirus.

For anyone else viewing this solution, most helpful to me was not the actual solution in the article, but the comment second from the top at the end of the article.
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