To install USB2.0 driver in WinXP,you must follow the steps list below.

Step 1:
  Please go to "Windows Update" (http://windowsupdate.microsoft.com) to Install
Microsoft USB 2.0 Host Controller Driver or Windows XP Service Pack 1.

Step 2:
  Open Device Manager and open the properties for the USB 2.0 host controller.
Then Click 'Refresh' button and you will see the USB2.0 driver is install already.