I ran into a problem yesterday where I couldn't use the Remote Desktop client in Windows 8 to connect to a client-side Hyper-V guest. I got the following error:
Remote Desktop cannot verify the identity of the remote computer because there is a time or date difference between your computer and the remote computer. Make sure your computer's clock is set to the correct time and then try connecting again. If the problem occurs again, contact your network administrator or the owner of the remote computer.