If the update you are referring to is the Windows 10 April 2018 Update (also known as Build 17134), the solution below worked for some people after their camera stopped working after the April Update:
"The problem appears to be that the Windows 10 April update has changed access permissions for devices such as the camera and microphone, restricting all by default to none. Go to Privacy Settings. Select the tab "Camera" and turn on "Allow apps to access your camera".
You can check which Windows version your computer is using in the System Information window. you can find this by typing 'system info' into the text box at the bottom of your Windows screen, next to the button used to shut the computer down.