RDP for Win7 not working

I recently ran into an issue where my laptop running Win7 would not properly connect to a terminal server. The TS is load balanced with some Win2008 servers and some Win2003 servers. Regardless of the server I was directed to, I got the following error:
The remote computer disconnected the session because of an error in the licensing protocol
When you do Google searches, many of them talk about removing a licensing key in the registry. However, this did not work.

The eventual fix was to run Remote Desktop as Administrator. Then it connected fine. I can only assume it needed the elevated priviledges to modify the necessary registry keys. However, that is an assumption and I have no facts to back that up.

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