There wouldn't happen to be a setting for that in IR's or PS's pref's, would there? I would look, but I don't have it here. It's worth a look.
If I were to really hazard a guess, step out on a limb, roll the dice, etc, I would exhaustively search the registry and ini files (sysedit). Now that I think about it, go to Start/Run and type in sysedit. Look thru all those ini files for any reference to IR.
Let me know what you find. "It's easier to ask forgiveness than it is to get permission." - Rear Admiral Dr. Grace Hopper