slow down,please,what cam?, the one in the top screen bezel or
any of 1000 usb webcams/??? (where is your cam, i cant see it)
the in bezel cam , can be more than one type, on even one HP PC, (series)
so in there correct page for 8440p
you then selected w7
the picked 32bit or 64bit , did you?
the you see camera drivers, and there may be
2 or more, web camera, sp12345.exe files
when you run one and it tells you wrong one, it is.
its that simple.
if you get the OS wrong, the camera wrong or the 32/64bit wrong
it will fail.
click control panel , then pick system
right on that page it says 32bit or 64bit.
i have a bunch of 8540w that all work with cam, even with w10-64
here ill click for you
https://support.hp.com/us-en/drivers/selfservice/hp-elitebook-8440p-notebook-pc/4095872
i pick w7 and guess its 32bit.
then I see what.
i Click software multimedia
and run this.
http://ftp.hp.com/pub/softpaq/sp52001-52500/sp52437.exe
shows as 32/64 bit both
the camera inside can be.
missing
wires fell off.
or dead.
seen that many a time. from other service one,
they sold it with no cam and with cam.
some PC like this , the other owner puts in a new screen lacking a camera cuz its cheaper or only one he can find.
see? so looking inside matters big time.