Could not load type 'System.ServiceModel.Activation.HttpModule'

Windows 7 / Server 2008

64bit

%SYSTEMROOT%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis /iru

32bit 
%SYSTEMROOT%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis /iru

 

windows 8 , Server 2012

c: cd %windir%\system32\inetsrv appcmd.exe set config -section:system.webServer/modules /[name='ServiceModel'].preCondition:"managedHandler,runtimeVersionv2.0/commit:apphost