I did a Windows update and afterwards my asp.net mvc 5 application will no longer load complaining about CS0234: The type or namespace name 'Html' does not exist in the namespace 'System.Web.Mvc' indicating my views web.config is at fault <system.web.webPages.razor> <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD
![After Windows update "The type or namespace name 'Html' does not exist in the namespace 'System.Web.Mvc'"](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)