Built in RealSense cameras are harder to fix problems with than the USB versions unfortunately. The first action I recommend trying is to download the camera drivers for your Lenovo from the Lenovo support webpage instead of using the drivers for the USB versions on Intel's site.
Thanks for the reply but it says I already have a newer version of the driver on my system and will not let me do it so the above answer does not work I am afraid,
This discussion may be of interest to you, as it also features problems with a built-in F200 camera.
Regarding the discussion's reference to a Recovery Boot system to restore your PC to factory condition ... on Lenovos, this feature is called Lenovo OneKey Recovery.
Here is how to fix We can’t find your camera in Windows 10 error code 0xA00F4244
1 – Through Settings Pane
2 – By Resetting The Camera App
3 – Update Webcam Driver
4 – Re Register Windows Store App
5 – Roll Back Your Webcam Driver