I FOUND IT!! The program causing all the trouble was Ulead DVD\nWorkshop.\n\nUlead was one of several programs which was on the computer when I\nbought it used. I only ran it a couple of times for DVD authoring. I\nhadn't run it in months, when all of a sudden, for no apparent reason,\nI found that I could no longer open any .wav files. Either the\nbrowser would close, or else the computer would go to bluescreen and\nI'd have to reboot.\n\nI tried for about a week to find the cause of this annoyance, finally\nremoving one program at at time. When I removed Ulead, the problem\nwent away.\n\nHas anyone else had a similar problem?