The drivers from the Sony site should work:
http://esupport.sony.com/US/perl/select-system.pl?DIRECTOR=DRIVER
Please note: I have no idea on your System; Model; Windows or any specs at all.
Please put your
System Specs information in your
Profile
I'd say do this:
1. Uninstall the drivers from Add/Remove programs in the Control Panel of Windows.
2. Restart the computer.
3. Run Driver Sweeper*, select the drivers that you have uninstalled and click Clean button.
4. Install the new drivers from Sony link above
* For Windows Vista users, please run Driver Sweeper in administrator mode.
Right mouse click Driver Sweeper shortcut and click Run as administrator.
To download and install Driver Sweeper, please click
HERE.
(direct link)
Save DriverSweeper_1.5.5-setup-[Guru3D.com].exe file on the hard disk.
Run DriverSweeper_1.5.5-setup-[Guru3D.com].exe.
edit:
Actually you can use this button (from Sony) to detect your system (Note: you must be using
Internet Explorer)

(VAIO PCs ONLY)