Try these steps in order:
- Check whether the camera is physically blocked.
- Open any privacy shutter on the webcam.
- If the keyboard has a camera key, press it or press Fn + that key.
- A green or unclear image can happen when privacy mode is enabled or the camera is covered.
- Make sure Windows allows camera access.
- Go to Start > Settings > Privacy & security > Camera.
- Turn Camera access to On.
- Turn Let apps access your camera to On.
- Run the camera troubleshooter.
- Open Get Help and run the automated camera troubleshooter.
- It can diagnose and fix many camera problems automatically.
- Try basic camera mode.
- Go to Settings > Bluetooth & devices > Cameras.
- Select the camera.
- Under Advanced camera options, select Edit.
- Turn on Turn on basic camera and select Apply.
- This can help when the camera is detected but the image is green or unstable.
- Reinstall the camera driver.
- Open Device Manager.
- Expand Cameras.
- Right-click the camera and select Uninstall device.
- Restart the laptop.
- Windows should reinstall the camera driver after restart.
- Check for device updates.
- If the device has a manufacturer support app or support page, install the latest webcam driver provided for the laptop model.
If the camera is still green or blurry after these steps, the issue is likely with the camera hardware or the manufacturer-specific driver.