Hi,
Try this
http://esupport.sony.com/perl/swu-list.pl?mdl=VGNFS740W
Start with the Original Drivers then do the Update.
EDIT:
In installing the drivers start with the CHIPSET driver first.
Refer to
http://www.techsupportforum.com/hard...facturers.html
on how the order of drivers should be installed.