The message you are seeing is not that you need a new driver to update it!
It says that you need to obtain new driver from the notebook manufacturer i.e. Toshiba instead of downloading the driver from the graphic provider like ATI/AMD or Nvidia.
The reason for this is that the notebook manuf. buys the same chip but develop their own drivers in order to optimize power and battery usage. In many cases they also re-design the board so while the chip / chipset is the same the HW implementation may vary.