User is getting the following error:
HTTP Error 500.21 - Internal Server Error handler "StaticFile" has a bad module "DefaultDocumentModule" in its module list
It seems that certain modules within ASP.NET are not installed on the server.
Run an elevated command prompt,
%windir%\system32\inetsrv\appcmd.exe install module /name:DefaultDocumentModule /image:%windir%\system32\inetsrv\defdoc.dll
