Maria Lopez Tudares, you are currently navigating within the standard Windows Settings application. The Camera Privacy Mode responsible for blocking your device is not an operating system feature; it is a proprietary firmware control managed exclusively through the manufacturer's dedicated software. You must close the Windows Settings window, open your Windows Start menu, and explicitly type "Lenovo Vantage" to launch the Lenovo-specific application. Within that specific app, navigate to the device settings to disable the privacy block. If the Vantage software was previously uninstalled, you can download it directly from the Microsoft Store.
Or, you can bypass the software interface entirely by locating the dedicated camera kill-switch key on your Yoga C640 keyboard, typically the F8 key, often requiring the Fn + F8 combination, and pressing it to hardware-enable the lens. Once the block is lifted via the Vantage application or the physical keyboard shortcut, you must execute the devmgmt.msc command and select "Scan for hardware changes" as previously instructed so Windows can finally detect the module.
VPHAN