here you can search for Notebook graphic drivers.
Radeon HD series
Radeon HD 6xxxM series
Win 7 64bit
Now you will get the driver package… download this and save on desktop.
Now you have to unzip this package… right click on the catalyst mobility icon and choose unzip. Now you should get an unzipped package with all the dll files, etc…
The driver can be updated now in device manager… you have to do this manually… point to the unzipped folder on desktop and force window to choose these files.
As mentioned by PauPau… it seems that BSOD is related to the graphic card driver.
If ATI driver installation does not solve this, you can try to test the system using common Win 7 driver.
Uninstall the ATI driver in device manager (mark the graphic card and uninstall driver)
Additionally remove the Catalyst from system (control panel -> software)
Reboot the notebook and after new reboot the OS should reinstall the driver automatically…
Then you can test this again…
As another option, you can try to recover the notebook using Toshiba recovery image (HDD recovery or recovery disk)
Then test the notebook with fresh recovered system.
Did you try the last option mentioned above? I mean settings the notebook back to factory settings using Recovery disk (or HDD recovery)…
Would be interesting to know if this would eliminate the appearance of BSOD