Product:
Cognos Controller 10.3
Microsoft Windows 2008 R2 Server

Problem:
After new installation of Cognos Controller on old server, you get a error when you surf to Cognos Connection.

Error Message:
Server Error in Application “DEFAULT WEB SITE”Internet Information Services 7.5
Error Summary
HTTP Error 403.14 – Forbidden
The Web server is configured to not list the contents of this directory. Detailed Error Information
Module DirectoryListingModule
Notification ExecuteRequestHandler
Handler StaticFile
Error Code 0x00000000
Requested URL http://localhost:80/ibmcognos/
Physical Path C:\Program Files (x86)\ibm\cognos\c10\webcontent\
Logon Method Anonymous
Logon User Anonymous

Solution:
You need to change the virtual directory’s and applications inside IIS to point to the correct folder. The new controller program uses this folder C:\Program Files\ibm\cognos\ccr_64\webcontent
Change all settings inside IIS manager for Cognos Controller and try again.