I keep getting what I assume is a trouble warning,but don't know what it is.

Every now and then--say one to two minutes--with nothing else going on that I can associate with it, I hear "BAW-ung, BAW-ung, BAW-ung". And then silence. Three times. The "ung" is a softer, echo-like sound. No visible warning or information displays associated with it.

This is an almost-new Dell Inspiron 560 desktop, running Windows 7, if that's helpful.

Does anyone have any thoughts on cause and/or a fix? Especially a fix?

Dave Oesterreich