Fix webcam not detected or not working on Windows
Practical Windows troubleshooting for a webcam that is not detected, not showing in Device Manager, or not displaying video in apps.
Start here: the webcam is usually disabled, blocked, or using the wrong driver
A webcam that does not work on Windows 10 is most often caused by a physical switch, a privacy setting, the wrong app input, or a disabled or missing driver. The fix depends on which symptom you have: the webcam may be absent from Device Manager, present but not showing video, or giving a USB recognition error. Work through the checks below in order and retest the camera after each one.
Check the physical shutter, switch, and connection
On many laptops there is a small sliding cover or a camera kill switch above the screen or on the side of the case. If the cover is closed or the switch is off, the webcam may still appear in Windows but show only a black frame. Open the cover or move the switch to the on position.
For an external USB webcam, try a different USB port. If it is plugged into a hub or a front-panel port, connect it directly to a port on the back of the PC. A port that works for a mouse or keyboard does not always prove the camera is getting enough power or a stable data connection.
Check camera and microphone privacy settings
Windows 10 has separate privacy controls for camera and microphone. Open Settings, then Privacy, then Camera. Make sure that "Allow apps to access your camera" is on. Below that, confirm the specific app you are using is listed and enabled. Repeat this under Privacy, then Microphone if the microphone is also missing.
A camera that is visible in Device Manager but shows no video in an app is often blocked by this setting rather than broken. Change the setting, close the app completely, then reopen it.
Confirm the correct input is selected in the app
Video and audio are separate inputs. An app may detect the microphone but not the camera, or it may be set to a virtual camera or another device such as a document camera. In the app's settings, look for a camera or video input list and select the laptop or USB webcam by name. In meeting and recording software, also check the audio input list separately.
Check whether the webcam appears in Device Manager
Right-click the Start button and open Device Manager. Look under "Cameras" and "Imaging devices" or "Sound, video and game controllers". If the webcam is not listed at all, Windows has not loaded a usable device. On a laptop, make sure the camera is not disabled in the BIOS or UEFI firmware, because some business laptops allow the camera to be turned off there.
If you see an entry with a yellow warning triangle, a down arrow, or a name such as "Unknown device" or "USB Camera" that does not match the hardware, the driver or device status needs attention. A red or yellow marker usually points to a driver or connection problem rather than a broken camera.
Re-enable or reinstall the webcam driver
If the webcam is present but disabled, right-click it in Device Manager and choose "Enable device". Then close and reopen the camera app.
If it is enabled but not working, right-click the device and choose "Uninstall device". If Windows shows a checkbox to delete the driver software, leave it unchecked unless you already have an updated driver from the laptop or webcam manufacturer. After uninstalling, restart the PC. Windows will attempt to reload the default driver. This is reversible and does not erase your files.
If the driver still shows as unavailable or the device is not detected, install the camera driver from the laptop or webcam manufacturer's support page for your exact model and Windows version. Do not download camera drivers from unrelated third-party sites.
Rule out app-specific capture problems
Use the built-in Camera app as a neutral test. Open the Start menu, search for "Camera", and launch it. If the built-in app shows video, the webcam and driver are working and the fault is in the other app's input selection, permissions, or a background process that has already claimed the camera.
Close other apps that may be using the camera, including meeting apps, browser tabs, and screen recording tools. Only one app can usually use the camera at a time. After closing them, retest the original app.
What to do if the webcam is not recognized over USB
If Windows shows a notification such as "USB device not recognized", the camera may be drawing too much power, the cable may be faulty, or the port may not support enough power. Connect the camera directly to a USB port on the computer, not through a hub or extension cable. If the camera has a replaceable cable, try another one made for data, not just charging.
Test the webcam on another computer if one is available. If it also fails there, the camera or cable is the likely cause. If it works on another computer, continue with the driver and privacy steps on the original PC.
Know when to stop and seek repair
If the webcam worked before and no longer appears in Device Manager after the privacy settings, BIOS setting, USB port, driver reload, and manufacturer driver have all been checked, the camera module or its internal connection may have failed. For a laptop, contact the manufacturer or a repair service rather than replacing parts yourself unless you are qualified to open the machine.