After following the video and installing the latest DNN, and I tried http://localhost/dotnetnucke and I get the following error:
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Server Error in '/DotNetNuke' Application.

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Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC31007: Unable to open module file 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\dotnetnuke\bc254d14\a2ac2624\App_Code.eozlgcid.0.vb': System Error &Hc0000005& (Visual Basic internal compiler error)

Source Error:

[No relevant source lines]

Source File: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\dotnetnuke\bc254d14\a2ac2624\App_Code.eozlgcid.0.vb :    Line: 0
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I must say, I was not able to create permission for the DNN folder with Vista & IIS 7. When I tried to use the user IIS AppPool\DefaultAppPool
Is this error related to the fact that folder doesn't have modify permission?

Someone help. This installation is PITA.

Matt, the first problem during installation I've had, is that I can not get the permission to the DNN folder, because under Vista32 and IIS, it does not find IIS AppPoll/DefaultAppPool. So this user is not even created to apply permission.

Is there any docs how to resolve this? or FAQ to installation problems?
I've been trying to install DNN all day, and no luck so far.

Is there any docs or solution, why a straight forward of a mature product would fail during installation? I've even used Web Platform installer and went ahead and set the .Net 4. framework folder with proper permission and I still can not get DNN to start on Vista with IIS 7. I hope the rest of the product isn't like this!