Asp.net web api exception only after deploying at IIS : A route named ‘HelpPage_Default’ is already in the route collection

I just ran into the same issue. I think the error was caused because I had pushed another solution to my site previously and there were leftover files that were somehow getting in the way. To fix this I checked the box that says “Remove additional files at destination” while publishing through Visual Studio to …

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MVC 4 website with .NET 4.5 on IIS 8 in Windows 8 gives 403.14 forbidden error [closed]

In “Turn Windows Features on or off”, under Internet Information Services -> World Wide Web Services -> Application Development Features, make sure that .NET Extensibility 3.5, .NET Extesibility 4.5, ASP.NET 3.5, ASP.NET 4.5, ISAPI Extensions, and ISAPI Filters are SELECTED. This was outlined here: http://www.iis.net/learn/get-started/whats-new-in-iis-8/iis-80-using-aspnet-35-and-aspnet-45#TOC301258515 but since that refered to server 2012 instead of windows …

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Check whether IIS is installed or not?

go to Start->Run type inetmgr and press OK. If you get an IIS configuration screen. It is installed, otherwise it isn’t. You can also check ControlPanel->Add Remove Programs, Click Add Remove Windows Components and look for IIS in the list of installed components. EDIT To Reinstall IIS. Control Panel -> Add Remove Programs -> Click …

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