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IIS 7.5 SharePoint error

Getting the following error when trying to open an IIS 7.5 web site where Sharepoint 2010 is installed.

Another component has already added an HttpSessionState to the context. Please make sure only one session state module should be registered

This is on a Windows 2008 machine.
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Commented:
Try unprovisioning CA and then reprovisioning it with the following commands:

psconfig -cmd adminvs -unprovision

psconfig -cmd adminvs -provision -port 8080 -windowsauthprovider onlyusentlm

Hi! Do you have problem with SharePoint site or not SharePoint site? This problem can mean inconsistent application configuration - some mix of framework v2 and v4.
http://forums.asp.net/t/1680039.aspx/1

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Commented:
Partial answer that required more research on my part