Post this; you may have to give access to individual apps so they can use the camera. Some security suites for Windows computers, block access of the camera. Check in settings of the software ...

If you enter 0 as the Value and confirm the change with Enter, no app or desktop application will have access to the camera. You don’t have to restart Windows for this, either. If someone starts ...

Antivirus programs often include privacy protection features that block access to the camera to prevent unauthorized usage. This can interfere with the Windows Camera app or specific modes ...