@Broten: I would recommend updating your BIOS and if that does not work, update your drivers using the ones provided by your OEM. What is the full model number of your laptop? Toshiba* Satellite P505-????
@Ashwini: Try doing a full uninstall of the graphics driver. You can find instructions for how to do that in the Readme.txt file that came with your graphics driver download. Afterwards, perform a re-install of the driver using the have-disk method outlined on this page; Graphics — How to update graphics driver for Microsoft Windows 7*
Let me know if after performing these two processes you are still experiencing the same issue or not.
Thanks,
-Nic