My brother gave my son his old HP Pavillion dv4000 Laptop (circa 2005/2006). It has a Toshiba MK1031 Hard drive showing 99.8 Gb useable HD capacity and only 13.4 Gb of free space. My brother removed all his personal info(documents, music, movies etc) from the laptop and it looks pretty clean but something is obviously taking up a lot of HD space. There is not even enough space to properly run a defrag as it gives a warning that it needs a minimum of 15Gb free to do so. It only has normal programs on it and none of them appear to be memory hogs. So where do you suppose the HD space has gone? Could it be in the Restore files? I'd like to free up at least half the 99Gb's before I turn this thing over to my son. It is using Windows XP Home as an OS. Thanks for any ideas.