XP In Place Upgrade

  To perform an in place upgrade of XP, follow the steps listed below.
  1. From  Windows insert the XP CD into the CD player.
  2. Choose install
  3. Select upgrade
  4. Follow prompts and when asked for Product Key, supply a valid Product Key.
  5. Continue setup to completion and activate over the internet if necessary.
  6. All updates and hot fixes will need to be reapplied.
  For more detailed information