Webcam and Microphone Failure Due to Power Management Conflict

This cause is suspected if the hardware disappears only after the system has been idle or after waking from sleep. Confirm this by checking if the 'Allow the computer to turn off this device to save power' checkbox is enabled under the Power Management tab for the specific USB Root Hub or the imaging device in Device Manager. If the issue disappears when 'Fast Startup' is disabled, it confirms a conflict in how the OS manages hardware power states during boot cycles.