had same issue with a nx6000 life cam, i dont know what m$
are doing with their drivers but i found the the original driver dosnt work with vista anyway, when you put in the driver disk a pop up redirects you here (& quite some download it was)
i reset the d/l eventually getting the driver , perhaps they are generic.
and as you see it refers to the 7000 even tho there is a vx700
(& mine was a nx6000)
so i would suggest trying the d/load, mine worked on vista
no problem with skype also id'ing the cam correctly so possibly it doesnt need a driver for vista, m$ seem too quick to drop the products and support.