Dell E6420 No Camera Detected


Oct 23, 2011
i have dell e6420 i5 laptop with builtin mic and cam
when i bought it probably 2 years ago its cam was working fine but only in windows 8.1 then i installed windows 7 and it was not working in it but i didnt noticed it because i didnt need it at that time and since then i've been using windows 7
recently i installed windows 8.1 but was unable to run cam whenever i tried to run it in windows camera aap it says that no camera detected then i updated the bios of my laptop to a7 but it didnt solve the problem and now i installed windows 10 and still i am having the same problem i tried dell webcam central but it didnt solve the problem and the cam is also not showing in device manager so REALLY need some help