If you want to use the USB cable to connect the Camera to the Computer to transfer the video to the Computer then:
(Applicable for Windows XP Operating System only):
As you are using a Windows XP Operating System then you have to install
the USB Streaming Driver in the Computer from the supplied Software
disk with the Computer.
Check this Link
for the instruction to transfer video to a Computer using USB Streaming.http://www.kb.sony.com/selfservice/documentLink.do?externalId=C222820As you do not have the supplied Software disk then I suggest that you use the i.LINK cable to transfer the video. The i.LINK port is also called IEEE 1394 or Firewire port.
An i.LINK is a black D shaped connector with 4 or 6 pins. The i.LINK cable is an optional accessory for the Camcorder. You require to purchase either a 4 - pin to 4 - pin or a 4 - pin to 6 - pin i.LINK / Firewire cable depending on the number of pins on the i.LINK / Firewire port of your Computer (since Camcorder will have only 4PIN i-LINK, while the Computer may have a 4PIN or 6 PIN i.LINK port).You do not require any Drivers or Software from Sony to transfer the
video from the Camcorder to the Computer using the i.LINK/Firewire
You can use any video capturing software like Windows Movie Maker
to transfer the video from the Camcorder to the Computer.
Refer this Link
for the instruction to transfer the video to the Computer using i.LINK cable.