Everything in the install process went through just fine.  When I finished it went to the "Default.aspx" I got this.

Server Error in '/DotNetNuke_2' Application.

---

Value cannot be null.
Parameter name: path1

[ArgumentNullException: Value cannot be null.
Parameter name: path1]
   System.IO.Path.Combine(String path1, String path2) +2717803
   DotNetNuke.UI.Skins.SkinDefaults..ctor(SkinDefaultType DefaultType) +127
   DotNetNuke.Common.Globals.get_DefaultSkin() +31
   DotNetNuke.Entities.Portals.PortalSettings.GetPortalSettings(Int32 TabId, PortalAliasInfo objPortalAliasInfo) +2812
   DotNetNuke.Common.Globals.GetHostPortalSettings() +216
   DotNetNuke.Common.Globals.GetPortalSettings() +79
   DotNetNuke.Authentication.ActiveDirectory.HttpModules.AuthenticationModule.Init(HttpApplication application) +198
   System.Web.HttpApplication.InitModules() +267
   System.Web.HttpApplication.InitInternal(HttpContext context, HttpApplicationState state, MethodInfo[] handlers) +1251
   System.Web.HttpApplicationFactory.GetNormalApplicationInstance(HttpContext context) +243
   System.Web.HttpApplicationFactory.GetApplicationInstance(HttpContext context) +106
   System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +214

Ok I fallowed the link and finally came to a fix.  How do I apply the fix? Besides the fix is there a way to just turn off AD authentication?  I dont care to use if its necessary. The message says to edit this code but where is it? Should I just re-install the entire application without AD support or can I go back un-install this service.

"This was a change required in order to support IIS7 "Integrated Pipeline" mode.

The 4.8.0 code has been nmodified so that most of the "App Start" code occurs on the first request - instead of in Application Start.  This is because there is no Request object until "Begin Request" when using Integrated Pipeline.

This means that there is no gurantee that the portal has completed its initialisation - until BeginRequest.

I therefore suggest the following (especially as the Init code in the provider uses the request object and would fail in IIS7 IP mode as well).

Modify the Init method to the following:

        Public Sub Init(ByVal application As HttpApplication) Implements IHttpModule.Init
                AddHandler application.AuthenticateRequest, AddressOf Me.OnAuthenticateRequest
        End Sub

Move the code that checks for the cookie to the beginning of OnAutheticateRequest, as follows

            'Cookies have to be enabled or DNN goes into infinite loop
            If Request.ServerVariables("HTTP_COOKIE") = "" Then
                Exit Sub
            End If

I am not sure why the rest of the code is there - but this may need to be moved to OnBeginRequest - if it is the method would need to include a call to Initialize.Init() to ensure that the startup code is run before accessing the portal settings. "