Error:
Access Services is unable to process the request.
(or)
Unrecognized attribute 'allowInsecureTransport'. Note that attribute names are case-sensitive. (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebClients\Bdc\client.config line 36)
(or)
Unrecognized attribute 'allowInsecureTransport'. Note that attribute names are case-sensitive. (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\WebClients\SecurityToken\client.config line 41)
Reason:
You will get this error, when you are trying to create any site using "Access Database service" like BDC or "Project Database" templates. The reason is Microsoft missed to update a patch in Windows 7.
Solution:
So, download a patch from https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=23806 (Windows6.1-KB976462-v2-x64.msu) and install this in your SharePoint machine.
Note: Don't forget to restart the machine to take effect.
That's it...