How do I prevent Lync 2010 from launching after installing?

Hello all.

I have tried looking everywhere to find a way to prevent Lync from starting after it is installed, but have not found anything.

I have tried adding the following reg keys, but they didn't work either:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Communicator]
"FirstRunLaunchMode"=dword:00000000

[HKEY_CURRENT_USER\Software\Microsoft\Communicator]
"FirstRunLaunchMode"=dword:00000000
"AutoOpenMainWindowWhenStartup"=dword:00000000

Any help would be greatly appreciated.