I am having some issue with my laptop. I have a Sony VAIO model VPCF13YFX. I have been unable to update to the latest drivers. I have tried the latest drivers (314.22) and I am having difficulties. During the installation process once the display goes black it stays black. I have to continuously roll back the drivers to an earlier version. Sony states that they support the 425M so I don't understand. I have successfully installed the 306.23 driver. My BIOS are the latest available.