Why Doesn't My Computer Detect the Webcam? (Complete Troubleshooting Guide)

Introduction

Connected your camera — but no image appears? Video calls in Zoom, Teams, or browser show a black screen, the device is missing from the list, or you see errors like:

Camera not found
Unable to connect to device
0xA00F4244 — No cameras are attached

Don't worry — in most cases, you can fix the problem yourself. Below is a clear step-by-step guide.

Before starting setup, we recommend checking your webcam using our service — it will quickly show if the browser and system can detect it.

Quick Solution

  1. Restart your computer. Often the driver "hangs," and a reboot fixes everything.
  2. Check the connection. For external cameras — unplug/replug USB, try another port (preferably rear on PC), temporarily remove USB hub.
  3. Close apps that may have "captured" the camera. Zoom, Discord, OBS, messengers. After closing, check again in browser.
  4. Select the correct camera in the program. In Zoom/Teams/Skype open Settings → Video and select the needed device.

If that doesn't help — proceed to detailed diagnostics.

Complete Step-by-Step Guide

1. Check If the System Detects Your Webcam

  1. Press Win + R → type devmgmt.msc → Enter.
  2. Open "Device Manager". Sections: Cameras or Imaging devices.
  • If camera is in the list — open Properties and check status: "Device is working properly".
  • If not — menu Action → Scan for hardware changes. Didn't appear? Try another USB port.
  • Sometimes camera shows as "Unknown device" in USB — then you need a driver.

2. Installing or Updating the Driver

  1. Right-click on camera → Update driver → Search automatically.
  2. If not found — download driver from laptop/camera manufacturer's website (Logitech, HP, A4Tech, etc.).
  3. Didn't help? Uninstall device (right-click → Uninstall) and restart PC — Windows will install basic driver automatically.

3. Windows Permissions (Privacy)

  1. Start → Settings → Privacy & Security → Camera.
  2. Enable Camera access for this device and Let apps access your camera.
  3. Scroll down and grant access to browser/needed program.

4. Browser Settings

Chrome / Edge

  1. Open a camera test website.
  2. Click the lock icon left in the address bar → Site settings → Camera.
  3. Select the needed device and allow access. Refresh the page.

Firefox

  1. When prompted, click Allow.
  2. If previously denied: Settings → Privacy → Permissions → Camera → remove site from list and allow again.

5. Physical Camera Lock

  • Check for mechanical shutter (common on Lenovo/HP/Dell).
  • Some models have a "camera key" (for example, Fn+F8 or Fn+Esc).

6. Antivirus and Privacy

Antiviruses may block camera access "for protection": Avast, Kaspersky, Norton, etc.

  • Disable "Webcam Shield / Webcam Protection" and check functionality.
  • If it helped — add browser to trusted.

7. Check in Other Applications

  • Skype → Settings → Video — does the camera appear?
  • Zoom → Settings → Video → try switching devices.
  • If it doesn't work anywhere — the problem is at driver/system/hardware level.

8. BIOS/UEFI

  1. Restart PC, enter BIOS (usually F2 / Del / Esc).
  2. Find Integrated Camera and make sure it's set to Enabled.

9. Linux (if applicable)

Check for device presence:

lsusb | grep -i camera

If device is visible but no image — install/check v4l-utils and browser permissions.

Conclusion

  • Check connection and if camera is occupied by other applications.
  • Update/reinstall drivers.
  • Allow access in Windows and browser.
  • Check antivirus, BIOS, and functionality in other applications.

After following these steps, the camera will start working in most cases. If not — test the device on another PC: it may be a hardware fault.

Reminder: first test the camera in browser via our service — it's faster to understand if the system can detect it.

Useful Links

  • Online camera check
  • Video call setup in Zoom / Skype
  • What to do if "microphone doesn't work" (Windows 10/11)