Firstly, in order to fix the issue, try to reboot your computer. If it doesn't help, navigate to Toshiba Download Center, identify your computer model, select your operating system and download the latest webcam files. After that, press Windows + R key combination, type devmgmt.msc and click OK. Expand the Imaging devices list, right-click on the webcam driver and select Update Driver Software. Use the Browse option to navigate to the downloaded files, select the driver and install it following the on-screen instructions.