Webcam not working in internet

I have a Dell Inspiron N7110 laptop, which has Intel HD Graphics 3000 built-in card. I recently bought external Lenovo FHD 300 webcam. When I connect to the USB port, it is getting recognized and driver is automatically getting installed in Windows 10. But when I run the camera application it...

Hello guys :) 1 month ago something happened and now I can not use my laptop camera in internet. To see if the problem is from the camera I've downloaded a virtual camera software like Manycam and still not working in internet. I've tried both ( the inbuilt cam and virtual cam ) in skype and...