25 Sep 2009
14 Jan 2010
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On the server in question, I had an inclination that the .NET framework had been installed before IIS. I un-installed all the .NET frameworks and also IIS. I did a reboot, installed IIS first, then the .NET 3.5 Framework Family. After the auto-install of Sitefinity, I now have success.
Thanks for the help, but it looks like the server had been the issue the whole time.