A family member has a failing computer running XP Pro whereas I have a spare drive on my own computer with an unused XP Pro installation already set up. My idea is to back up all his files/folders etc using the Back Up facility within Windows Live OneCare and then set him up on my spare drive. All XP installations in this house have passed Microsoft validation however, he does not have an installation CD but I can get his Product Key. I have two questions. What is the best method of preparing a computer for a fresh installation of XP Pro (is formatting the HDD too extreme)? Secondly, if I use my installation CD to re-install XP Pro on his computer but when the time comes to enter a Product Key, I enter HIS Product Key rather than my own, can that work? Are Product Keys only specific to the program/application being installed or are they specific to the individual installation CD being used?

how can i obtain a product key code to validate windows before my thirty days are up?

I know about the add/remove programs but it seems like there is so much junk on my computer still.

I want to clean out my hard drive so my computer can run faster. I was wondering if there is a way to clean my hard drive and only have windows xp left on it?

I am selling my computer and I want to make sure that everything is wiped clean before I sell it. How can I totally delete everything to what it was when I bought it? Do I need to buy something or is there a free program that will delete everything? I just want to make sure that nobody can get any of my personal info from it.