When accessing Frontdoor, I get an "HTTP Error 404.2 - Not Found" error

Symptoms

After a Windows automatic update, you may experience an error in which you are no longer able to access the locally hosted Frontdoor website. The error is only known to occur if you are running IIS 7.0, and the page you receive will look something like this:

Answer

In order to fix this, you need to adjust IIS to allow the recently installed .NET framework:

1. Right-click My Computer
2. Select Manage
3. Expand the Services and Applications node (Windows 7) or Roles node (Server 2008 R2)
4. Expand Web Server (IIS) (Sever 2008 R2 only)
5. Click Internet Information Services (IIS) Manager
6. Select your server in the Connections list
7. Scroll to IIS in the right pane
8. Double-click ISAPI and CGI Restrictions
9. Right-click and select Allow on any .NET versions that are not set to Allow
10. Close and reopen any browsers that were open before this configuration change