Thanks for reaching out to Microsoft Q&A Forum. I understand that you are unable to turn on your camera on Windows 11 and need it urgently to record and upload a video for your class.
Please make sure you already tried the Q&A Assist steps. In addition, please try the following.
Before that, I’d like to narrow this down a bit to better understand the situation:
1, Are you using the built‑in camera on a laptop or an external USB webcam?
2, Which app or website are you using to record the video for your class?
In the meantime, you can try these steps:
1, Restart the Windows camera service
- Press Windows key + R
- Type
services.mscand press Enter - Locate Windows Camera Frame Server
- Right‑click it and select Restart
2, Reset the Camera app
- Open Settings
- Select Apps
- Select Installed apps
- Locate Camera
- Select Advanced options
- Select Repair, then test the camera
- If it still does not work, select Reset and test again
3, Check camera access at the device level
- Open Settings
- Select Privacy and security
- Select Camera
- Make sure Camera access is turned on at the top of the page
4, Temporarily disable third‑party security software
- If any third‑party antivirus or privacy software is installed, temporarily disable it
- Test the camera again
- Re‑enable the software after testing
5, Force camera re‑initialization in Device Manager
- Right‑click Start and select Device Manager
- Expand Cameras
- Right‑click the camera and select Disable device
- Wait a few seconds, then right‑click it again and select Enable device
6, Check firmware‑level camera settings
- Restart the device and enter BIOS or UEFI settings
- Look for any option related to Camera, Imaging Device, or I O Devices
- Make sure the camera is enabled
- Save changes and restart Windows
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