I recenlty acquired a VGN-Z790 laptop and I reinstalled windows 7 64bit. Initially all drivers seem to install fine but later realized my internal microphone doesnt show up at all. The only device I have in recording devices is the external plugin microphone. I did enable to show up disabled devices as well. After looking over the net, it seems like the internal microphone is tied to camera drivers. Then I looked at the installed driver for the camera and it shows as USB Video Device (Sony VIsual COmmunication Camera in Device manager) and the provider of the driver is Microsoft and not Sony. So, I tried to reinstall the camera companison software form the Sony supposrt website and it always shows a message saying whether to install with compatibility settings. Either way, at the end it doesnt install. Tried to see if I can install the driver manually, but couldnt locate where this installer is copying the drivers.
At this point the only option is to have windows load automatically which will be microsoft driver and doesnt have support for my internal microphone.