When you use a dial-up Internet service provider (ISP) in Windows Vista, the Auto Disconnect dialog box may appear when you close Windows Internet Explorer 7. The Auto Disconnect feature closes the connection to the ISP after a designated period of inactivity or after the connection is no longer needed. However, the Auto Disconnect dialog box may automatically disappear after several seconds or after several minutes. Because of this problem, it may not be obvious that you are still connected to the dial-up ISP.