The camera doesn't work because of the following error: "(ERROR): "Webcam driver open fail. Please restart camera or computer".
The error is related to the fact that the driver has failed to work. You can restore its functionality using two methods.
Download the driver again from the Toshiba website. The driver will be found on the page for your model. The Camera Assistant Software is known to be installed for cams on Toshiba laptops. Input the model number of your laptop and then download the driver (software included).
Reinstall the software using Control panel > Uninstall a program. Locate the software on the list and select Uninstall, instead, use Repair to continue the procedure. This installs the driver as well as the software.