Hi Ophélie,
If the Surface camera driver doesn't show in the Device Manager, it is posible that the driver got corrupted. The driver can be installed by running Windows update or download the driver and firmware manually. Click on this link on how you can download the Surface drivers.
You may also run the hardware troubleshooter to resolve the issue with the Surface camera. To run the troubleshooter, follow these steps:
- Type Troubleshooting in the search box, click Troubleshooting.
- Under Hardware and Sound, choose Configure a device.
- The Hardware Troubleshooter will open.
- Click on Next to run the Hardware and Devices Troubleshooter.
- Choose the one you want to fix and click on Next.
Let us know if you need further assistance.