I upgraded one of my terminal servers from 2003 to 2008, now when logged into remote desktop on the 2008 server any dialogue box that pops up causes a system "beep". It does appear to be controlled by windows, either on the local desktop or the remote side. It does not play thru the speakers but instead comes from the "buzzer" that is internal to the PC. I have muted speakers on the remote desktop as well as locally and have also set it to no sound in the control panel of both.
How can I turn this off?