Welcome to Tom's Hardware Forums,
Here's what Sony has to say about your driver(s)
"Don't I need drivers from Sony for Microsoft® Windows® 7?
Not necessarily. Basic system functionality should be automatically enabled with the drivers included within the Windows® 7 operating system.
However, if one of the drivers that came with the operating system does not work with your system, you can try installing the Windows Vista® version of the driver provided by Sony for your model. Many of the Windows Vista® drivers are compatible with Windows® 7 based on current testing. Make sure you choose the bit version (32-bit or 64-bit) that matches your version of Windows® 7.
Note: Sony software applications that originally shipped with the computer may not work after upgrade"
Which was found here http://esupport.sony.com/US/perl/os7upgrade.pl?mdl=VGNA...
Hope it helps