I installed a fresh copy of Lync Server 2010 Standard and got all the way through the install without a problem.....but none of the services would start. I was getting this error:
The Lync Server Front-End service terminated with service-specific error %%-2146762487.
Warning: Cannot start service RTCPDPCORE on computer **************.
This problem in my situation was because I was using an internal certificate authority. My certificate was just fine and was correctly applied to the server, but I forgot to import my internal CA chain into the server as a trusted root certification authority. As soon as I did this the services started right up.