You can download the driver here (64 bit drivers) or you could go to the HP site. http://www.driverstag.com/hp-pavilion-dv6/hp-pavilion-dv6-6c35dx-drivers-for-windows-7/
Note, not the first download box this is a advert.
Often you can use XP wireless drivers on Windows 7 although sometimes you get interesting bugs if you do, a vista driver would probably work even better. Make sure that you chose either 32 or 64 bit according to which operating system you have. A lazy way of getting the driver is to simply connect your laptop via a Ethernet cable to your router and use Microsoft update to find your driver for you.