When trying to connect to a computer over RDP (remote desktop) you get the following message
“Because of an error in data encryption, this session will end. Please try connecting to the remote computer again.”
On the computer that is giving the error:
1. Click start > run type ‘regedit’.
2. Navigate to:
3. Under this registry subkey, delete the following values:
* X509 Certificate
* X509 Certificate ID
4. Quit Registry Editor, and then restart the computer.
More on: http://support.microsoft.com/?kbid=323497