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 Vista Operating System Only.)
Camcorder does not support USB streaming with the VISTA Operating
System. Use an i.LINK cable to transfer the video to the Computer. 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 type of cable to be used
will depend on the i.LINK port of your Computer. The Sony Camcorder will
have the 4 pin i.LINK cable and if the computer has the 6 pin i.LINK
port, then you may have to use the 4 pin to 6 pin i.LINK Cable).
You can use any video capturing software like Windows Movie Maker to transfer the video from the Computer.
Refer this link for the instruction to transfer the video to the Computer using i.LINK cable.http://www.kb.sony.com/selfservice/documentLink.do?externalId=C111893
Camcorder does not support USB streaming with Vista, it is not required
to use any Sony Device Driver to transfer the video to the Computer. 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 interface.
(Applicable for Windows XP Operating System only):
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=C222820
If you do not have the supplied Software disk then I suggest that you use the i.LINK cable to transfer the video.