probably you have tried this but try again and again bcos it worked for me when I got the same proble as you

step 1
remove all drivers related to camera or imaging from the device manager

let it auto detect

you should get an ! mark or some error

make sure you got an internet connection

update the driver (right click then Search Automatically for ... that option) and let OS detect it online for you and download a driver certified for W10)

if these does not work you have to repeat step 1 - again cos you missed out something
and did not remove the 'stuck' wrong driver

let us know hows your progress.

happened to me too and yes it was also a Dell laptop.. dell dell dell ah

There is one way that I know but you may not like this way it is to install windows 7 in the same laptop that you so that you dual booting with Windows 10

But this way is the only check if your camera hardware is working or not

After all originally your laptop came with Windows seven and camera was working right

then when you upgraded to Windows 10 the camera is not working so it may be a driver problem but then again we do not know it may be a hardware problem too happen at that ngam ngam time

Okay that is too complicated I know but then again this is a built-in camera so unless you can find a program to test I think they are many that you can search for maybe then you are able to check if the camera is not broken or not.

If you look at my profile and check my thread posting I have a sharing to software that can check hardware n diagnostics and you can download from that posting and try

Try all the ways that you think you can you can firstly to determine if it is hw or not because if it is hw you and me we cant do anything

the only hope that it is just a driver problem that your Windows doesn't want to install

So for now that is the hold of jective to find out to eliminate to find out to eliminate then come back share with us what are your findings