We have a Dell Dimension 2400 of Feb 2005 which was originally supplied at XP pro SP1 level by Dell, and was updated by an external consultancy to SP2. They also added a whole pile of special software, some clearly not compatible. The upshot is it has never worked properly, and even after my best efforts it still behaves oddly at times. I have lost patience with it and am replacing it with a new PC. My question is what to do with the old PC? Clearly I want to reformat and reinstall XP pro, but I am reluctant to do a reinstall from the built-in DELL hidden partition as that is SP1. How can I install from a more up-to-date copy of XP pro? I have neither an XP pro CD nor a more recent Dimension 2400 to start from, and I also recognise that Dell copies of XP are tied in some way to the hardware. Any suggestions please?