I discovered that some of our computers do not have a sound enabled on the volume control icon on the system tray. We used to control how strong the volume was by moving the lever up or down and then letting go, this would cause a "ding". It is not happenning anymore. Also, on the ones that it does not work, there is no sound when there is an error, like when you have a window open and then choose a setting that opens another window, and you try to click on the first window without closing the last one, it would cause a "ding" to let you know that the window was not available. I'm sure there is a setting somewhere that is not checked or something, but we don't know what it is. I checked on Start>settings>control panel>sounds, and checked all of the available default sounds (ie asterisk, exit windows, exclamation, etc.) and they all work. I would appreciate your help. Thank you.