I keep getting a small popup window entitled "Software Update". It happens without any warning or reason. It has 2 buttons in it - 'Finish' and 'Cancel' - and when I press either one of them they don't appear to do anything and the popup window just sits there! I have to press the 'X' button and close out this window every time it pops up. Does anyone know what this is, and more importantly how do I get rid of it?