If your camera or microphone isn't working in Microsoft Teams, work through these checks in order: physical block, Windows permissions, Teams device settings, then the camera driver. Most issues are resolved in the first two steps.
1. Check for a physical block
Check whether your camera has a physical cover or shutter closed over the lens.
Check for a privacy toggle or function key on your laptop that disables the camera or microphone.
2. Check Windows privacy settings
Go to Start > Settings > Privacy and security > Camera.
Confirm access is allowed for apps in general, and specifically for Microsoft Teams.
Repeat the check under Privacy and security > Microphone.
3. Check Teams device settings
Open Teams and go to Settings > Devices.
Confirm the correct camera is selected under Camera.
Confirm the correct microphone and speaker are selected under Audio devices.
4. Update the camera driver
Open Device Manager and expand Cameras.
Right-click the camera and select Update driver.
If that doesn't fix it, right-click the camera again, select Uninstall device, then restart. Windows reinstalls the driver automatically on startup.
What happens next
If the issue persists after these steps, submit a Device Support request in the platform.