I have Toshiba satellite m840. I have the camera app on start menu and I believe  it has built-in camera. however, I wasn't able to open it, saying "to get started, connect a camera". I tried to search on what to do, check if it's turned on in uefi settings, restarted my computer. I upgraded my pc as well coz I don't have much choice. it's win 8.1. after checking on device manager, imaging device is not there. some says to reinstall it again, but how? how to get compatible webcam driver to get my camera working? please guys ,help.