Problem of my pc camera

Question

we have our pc camerafrom 2 years
recently a problem has occured in my computer
so we have re installed every thing.
from then onwards its not working
if we go on to itthe computer is promting that it is not connected
i checked whether it is really not connected but it is already connected
it even prompts thatit donot function properly
WE HAVE DRIVER DISK OF THIS TOO