ASP.NET MVC on IIS 7.5

ASP.NET 4 was not registered in IIS. Had to run the following command in the command line/run

32bit (x86) Windows

%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -ir

64bit (x64) Windows

%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -ir

Note from David Murdoch's comment:

That the .net version has changed since this Answer was posted. Check which version of the framework is in the %windir%\Microsoft.NET\Framework64 directory and change the command accordingly before running (it is currently v4.0.30319)

One more thing to make sure you have is the following set in your web.config:

<system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/> 
</system.webServer>

Make sure you have is the following set in your web.config:

<system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/> 
</system.webServer>

Better solution:

Even though above solution works absolutely fine, it can cause other problem as it runs all your registered HTTP modules on every request (even on every request of .jpg .gif .css .html .pdf etc) and it is obviously waste of resource. Instead

<system.webServer>
<modules>
  <remove name="UrlRoutingModule-4.0"/>
  <add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" preCondition="" />
</modules>
</system.webServer>

Make sure preCondition attribute is empty means it will run on all requests. [Read more](http://www.britishdeveloper.co.uk/2010/06/dont-use-modules-runallmanagedmodulesfo.html,"Read original post")