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are you sure IIS is not installed, as it certainly sounds like IIS or other webserver is binding to TCP 80<br />
can you try to fire up <a href="http://localhost" rel="ugc">http://localhost</a><br />
let us see if there is any running websites, also something like <a href="http://live.sysinternals.com/Tcpview.exe" rel="ugc">TCPView</a> should be able to tell you which application is listening on port 80 <br />
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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 [http://localhost]
let us see if there is any running websites, also something like TCPView [http://live.sysinternals.com/Tcpview.exe] should be able to tell you which application is listening on port 80 
 


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I have a solution that contains an ASP.NET website and several silverlight projects. &nbsp;In order to allow these projects to work well together on deployment, I am trying to run Visual Studio on Port 80. &nbsp;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. &nbsp;Now I cannot run my website on Port 80 or import any service references unless I change the website to a dynamic port. &nbsp;I get the error &quot;Port 80 in use&quot;. &nbsp;If I change to a different static port I get the same error for that port number. &nbsp;I know these things are difficult to troubleshoot, but any ideas would be greatly appreciated. &nbsp;<br />
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Note: I am not running IIS on my machine. &nbsp;I have restarted VS and my machine several times.
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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.

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

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