How to Resolve Camera Error Code 0xa00f4243 on Windows PC

When trying to use the webcam on a Windows 10 system, you may encounter this error: “Close other applications. It looks like another application is already using the camera. If you need one, here is the error code: 0xA00F4243(0xC00D3704)“. This error prevents you from using the webcam because it looks like another application is already using it.

The error code 0xA00F4243(0xC00D3704) of the built-in camera in your Windows 10 PC is mainly caused by an interruption between two applications using the Windows 10 camera at the same time. Although you can check which application is causing this problem in Task Manager and kill it if you find it, in most cases it doesn’t help.

Fortunately, there is a solution that works for most users. Let’s take a look at how.

What causes the camera error code 0xa00f4243?

Camera disconnected by pressing a key: Some laptop configurations (especially Lenovo models) include a physical hotkey that allows you to disable the built-in camera via the Fn key.

Excessive AV protection interferes with the camera application: Node32, AVG and various other third-party security suites may prevent access to the camera application for security reasons. If you are sure that there is no security threat, you can remove the third-party antivirus program.

Faulty Windows update: Another possibility that can cause this error is a faulty Windows update that has affected the functionality of the camera.

A corrupted file causes the error: It turns out that this particular problem can also be caused by a corrupted file or an incomplete driver that limits the functionality of the camera.

How to repair the camera error code 0xa00f4243?

Resetting the camera application

  1. Enter the keyword Apps in the Cortana search box.
  2. Tap Apps and features to open a list of apps in Settings.
  3. Select Camera and tap More Options.
  4. Press the Reset button and select Reset again to confirm.
  5. Reset the camera app.

Restart Windows

  1. First, right-click on the Start button and select Run.
  2. Type MSConfig in the Startup window and click OK to open the System Configuration window.
  3. On the General tab, click the Selective Run radio button.
  4. Uncheck Load startup items to remove third-party software from system startup.
  5. Select the Use initial startup configuration and Load system service settings checkboxes under the Selective startup radio button.
  6. Click the Services tab.
  7. Select the Hide all Microsoft services check box.
  8. Then select the Disable All option and click Apply.
  9. Click the OK button.
  10. In the System Configuration dialog box, select the Restart option that appears.

Update the webcam driver

  1. Press Win + S and search for Device Manager.
  2. Find the webcam driver.
  3. Right-click on it and select Update Driver.
  4. Wait for the driver to be updated.

Disable any other applications that use the webcam

  1. Click Enter here to search in the taskbar to open Cortana.
  2. Enter the camera as your search query.
  3. Click Camera Privacy Settings to open the settings as shown below.
  4. First, make sure the Allow apps to access the camera option is enabled.
  5. Scroll down and disable apps that use the webcam.
  6. Leave the camera app-enabled.

Frequently Asked Questions

Error code 0xA00F4243(0xC00D3704) is a Windows camera error that disrupts users on their phones, laptops, and other devices. ... In most cases, the occurrence of the error indicates that an interruption has occurred between two programs using the built-in camera on a Windows device.

Locate your camera under Cameras, Imaging Devices or Sound, Video, and Game Controllers. If you can't find your camera, select the Actions menu, then Search for Hardware Changes. Wait for the scan to complete, reinstall the updated drivers, reboot your device, and then try opening the Camera app again.

  1. Update the webcam driver.
  2. Close the applications using the task manager.
  3. Reboot Windows.
  4. Disable other applications that use the webcam.
  5. Reset the camera application.

The error message "Your webcam is currently being used by another application" may be because Skype cannot access your computer's camera. Go to Settings -> Privacy -> select Camera in the left pane. In the right pane, turn on the "Allow applications to access the camera" option.