Hardware
Camera Error 0xA00F4243: "Another App Is Using the Camera" in Windows 11
You try to start your webcam and Windows shows error 0xA00F4243 — “Another app or process is using the camera.”
Why: Only one app can hold the camera at a time. If Teams, Zoom, Skype, or a browser tab already grabbed it (sometimes invisibly in the background), the next app is locked out. The fix is to find and release whatever is holding it.
Fix 1: Close the other apps using your camera
- Close any obvious video apps — Teams, Zoom, Skype, OBS, Camera, or a browser tab on a video call.
- A browser left open on a meeting site keeps the camera even when you can’t see it — close that tab or the whole browser.
- Reopen only the one app you want to use the camera in.
Fix 2: End stray camera processes in Task Manager
If nothing obvious is open, a hung process may still hold the camera:
- Right-click the taskbar → Task Manager.
- Find any video/conferencing app or a stuck process.
- Right-click it → End task.
- Try your camera again.
Fix 3: Re-toggle camera access, then reboot
- Start → Settings → Privacy & security → Camera.
- Confirm Camera access and Let apps access your camera are on, and the app you want is allowed in the list.
- Turn the target app’s toggle off, then on to break a stuck lock.
- If it still won’t release, restart the PC — that clears every process holding the camera.
FAQ
Why does this happen right after a call ends? Some apps don’t release the camera cleanly when a meeting closes. Fully quitting the app (not just leaving the call) or a reboot frees it.
Camera isn’t found at all instead? That’s error 0xA00F4244 — see Camera error 0xA00F4244 “We can’t find your camera”.