Start with the basics: power, connection, and permission

Most webcam problems come from three things: the camera is not plugged in or connected, the operating system has not given it permission to run, or the software driver is out of date. Before you troubleshoot anything else, check that your USB cable is firmly seated in the port, that the webcam is powered on if it has a power switch, and that you can see it in your device list.

On Windows, open Device Manager by right-clicking the Start button and selecting it from the menu. Look for "Cameras" or "Imaging devices" in the list. On Mac, open System Report from the Apple menu, click System Information, then select USB. Your webcam should appear there. If it does not show up at all, the connection is the problem — try a different USB port or a different cable before assuming the camera itself is broken.

Key Takeaways

  • Check the physical connection first: make sure the USB cable is fully inserted and try a different port on your computer.
  • Windows and Mac both have built-in tools to see whether your computer recognizes the camera as a device.
  • Permission settings in your operating system or browser can block a webcam even when it is working — check Settings on Windows or System Preferences on Mac.
  • Updating or reinstalling the camera driver solves most software-related failures and takes ten to fifteen minutes.
  • If the camera appears in Device Manager but shows an error code, a driver reinstall or a Windows update usually fixes it.

Grant permission in Windows Settings

Windows 10 and 11 require you to give apps permission to use the camera. Open Settings, go to Privacy & Security, then select Camera. Toggle the Camera access switch to On. Below that, you will see a list of apps — make sure the toggle is on for any program you want to use the camera with, such as Zoom, Teams, or your browser.

If Camera access is already on but a specific app is blocked, that is your answer. Turn it on for that app. If you do not see your app in the list, it may not have asked for permission yet — open the app, try to use the camera, and Windows will prompt you to allow it.

Check Mac camera permissions

On Mac, open System Preferences (or System Settings on newer versions), then go to Security & Privacy. Click the Privacy tab and select Camera from the left menu. You will see a list of apps that have requested camera access. Make sure the app you want to use is checked. If it is not there, the app has not asked yet — open the app and try to use the camera, and macOS will prompt you to allow it.

If an app is checked but the camera still does not work in that app, try unchecking it, closing the app completely, then checking it again. This resets the permission and often fixes temporary glitches.

Update or reinstall the camera driver on Windows

A driver is software that tells Windows how to talk to your hardware. Outdated or corrupted drivers are the most common reason a camera stops working after it was working before. Open Device Manager, find your camera under Cameras or Imaging devices, right-click it, and select Update driver. Choose "Search automatically for updated driver software" and let Windows search online.

If that does not work, right-click the camera again and select Uninstall device. Restart your computer. Windows will automatically reinstall the driver when it boots up. If you know the camera manufacturer, you can also visit their website, read the latest driver for your model, and install it manually — this is slower but sometimes more reliable than the automatic search.

Check for error codes in Device Manager

If your camera appears in Device Manager but has a yellow exclamation mark or a red X next to it, Windows is telling you there is a problem. Right-click the camera and select Properties to see the error code. Common codes include Code 10 (driver issue), Code 43 (hardware failure), and Code 37 (conflict with another device).

For Code 10 or Code 37, uninstall the device, restart your computer, and let Windows reinstall the driver. If the error persists, try unplugging all other USB devices except your keyboard and mouse, then restart. Sometimes a power conflict between devices causes the camera to fail. For Code 43, the camera hardware may be damaged — try a different USB port first, but if that does not work, the camera may need replacement.

Disable and re-enable the camera

A quick reset often fixes temporary software problems. Open Device Manager, right-click your camera, and select Disable device. Wait ten seconds, then right-click it again and select Enable device. Windows will reinitialize the connection. This is faster than restarting and works for glitches that a restart would also fix.

On Mac, there is no disable option in System Information, but you can restart your computer or try unplugging and replugging the USB cable while the computer is on. Wait five seconds between unplugging and replugging.

Test the camera in a different process

If the camera works in one app but not another, the problem is with that specific app, not your hardware. Try opening the camera in the built-in Camera app on Windows or Photo Booth on Mac. If it works there, the issue is the other app's settings or permissions. Go back to your operating system's privacy settings and make sure that app has camera permission. If it does, try uninstalling and reinstalling that app.

If the camera does not work in any app, the problem is your hardware or driver, and you should follow the driver update steps above. If it works in the built-in app but not in Zoom or Teams, those apps may need their own permission grant inside the app itself — check their settings menus for camera or device options.

Frequently Asked Questions

Why does my camera show in Device Manager but not in Zoom?

Zoom needs two permissions: one from Windows and one from Zoom itself. Check Windows Settings under Privacy & Security > Camera and make sure Zoom is toggled on. Then open Zoom, go to Settings, click Video, and check that your camera is selected in the Camera dropdown. If it is not listed, Zoom may not have permission — restart Zoom after granting permission in Windows Settings.

My camera was working yesterday and now it is not. What changed?

A Windows or app update often changes driver behavior or resets permissions. Check Windows Update to see if an update installed recently. If so, restart your computer. If the camera still does not work, uninstall the camera device in Device Manager and restart — Windows will reinstall the driver. If an app updated, restart that app or reinstall it.

Can I use a USB hub instead of plugging the camera directly into my computer?

Yes, but USB hubs can cause power issues if they are not powered hubs. If your camera does not work through a hub, plug it directly into a USB port on your computer. If it works directly but not through the hub, the hub is not supplying enough power — try a powered hub or a different port on your computer.

What if my camera is recognized but shows a black screen?

A black screen usually means the camera is on but the lens is blocked or the app is using the wrong camera. Check that nothing is covering the lens. If you have multiple cameras, open your app's settings and make sure the correct camera is selected. You can also try disabling and re-enabling the camera in Device Manager, or restart the app.

Do I need to uninstall the old driver before installing a new one?

No. When you use Windows Update to install a new driver, it replaces the old one automatically. If you are installing a driver manually from the manufacturer's website, their installer usually handles the replacement. You only need to uninstall first if you are switching to a completely different camera or if the manufacturer's instructions tell you to.