Question : I HAVE A SONY VAIO MODEL: VGN-FW351J

It has XP professional 64 bit OS. I need the drivers for this machine  Where can i find these?

Answer : I HAVE A SONY VAIO MODEL: VGN-FW351J

Sony's website is your best bet

http://b2b.sony.com/b2bMicrosites/landingpage/vaio_drivers/download_vaio_drivers.html

If the do not have specific drivers for things like Network cards,  Graphics sounds etc you can go direct to the manufacturers websites if you know what they are.