Update = After verifying ownership and completing troubleshooting, a DELL agent setup service.
Since October the 18th, the webcam on my laptop has not been working. When I try and use the windows camera app, it shows error code 0xA00F4244 . In device manager, I don't see the Camera or Imaging Devices sections. I do see "Unknown USB Device" under the Universal Serial Bus Controllers section.  I've tried various things to resolve this, such as rolling back a Windows update that I think is the cause, doing a system restore, removing all the things under the Universal Serial Bus Controllers section and letting them reinstall themselves. Nothing works. I've also tried booting into Ubuntu via a usb stick and found that the webcam also cannot be detected there, which makes me think it might be something to do with the BIOS or chipset drivers.I've checked in the BIOS and the webcam is enabled.Any ideas? Could this just be a hardware fault? Is there any way to confirm this?
XPS 9310 camera not detected