Originally Posted by Saab Dastard
Put the cursor in the 'Press new shortcut key' field, and press Ctrl-Z (for example) as the shortcut key stroke.
Of course, if one truly doesn't get on with Windoze or Micros**t, CTRL-Z wouldn't be a good keystroke to choose for this.
Its usual function of "Undo" is extremely useful for rectifying those "What the ****'s the ****ing thing done now?" moments.