Have you ever clicked on Microsoft Lync 2010 (communicator) only to find out that nothing happens? I am not exactly sure what is causing it, but I have noticed that If I start Outlook 2010 first before Lync 2010, Lync 2010 does not like it.
If you look at your task manager, you’ll see that the communicator.exe*32 processes are backlogged. Try killing these processes and launching Lync again. Hopefully it’ll work. It my case, it definitely worked. Good luck.