Oh, Something worked for me I uninstalled the device driver including the Integrated camera device and installed the driver mentioned in the screenshot_1 above. As you can see the device is working fine for now.. I guess?
Here's what I did Go to the device manager > uninstall the Unknown USB Device (Device Descriptor Failed) > Click on the view tab above > select show hidden devices > expand your camera device > right click on your Integrated Camera > uninstall
Once uninstall process finishes install the latest downloaded driver for your device (mine was from lenovo support site)
> Install the driver > shutdown the pc (yeah do not reboot it) > start your pc > if the camera shows same error > right click on the
Unknown USB Device > update driver > browse from the computer > let me select > select the compatible one (as it is the only one listed) and your camera may start working again don't know if it will work for everyone though