I have a main form with a timer on it waiting for a flag that tells it that the app is shuting down this timer also moves a floating image around indication the app is running. A main menu form actually has the quit button in it that sets the flag. On one of my machines running winXP the timer seems to stop firing after a few minutes the image quits floating around and quiting the app will not work. Have to end task at this point. As far as I know this is the only machine that does this.