On my laptop, when I select multiple files (by holding down SHIFT key and tapping DOWN ARROW key), the computer "dings/chimes" at me, as if a warning stop, like I'm doing something wrong.  It selects the files just fine, but I just get this sound (it gets irritating very quickly).  
I thought it might be a Windows (Vista) problem (and it may yet be), but in Explorer, this does not occur - only in BRU.
I can't find any "sound" options in menu.  Any suggestions?