I'm in a situation where my Dad's computer (Xp box) will not install Norton 2004. He had Norton 2003, but clearly something must have happened to system. 2004 would not install on top of 2003. So, we removed 2003 completely (from Add/Remove Programs), and tried again. No luck. 2004 will not install. We've checked his disk (optimization/defrag). Does anyone have any suggestions?