I have a Toshiba Satellite C855D-S5340 which came with Windows 8. I replaced the hard drive and memory card/stick and reinstalled with Windows 7, 64 bit. I downloaded all the available drivers for this build from the Toshiba site. My problem is the network controller driver is not installed therefore I cannot connect to the web. Through the device manager, I see "manufacturer unknown" "device driver not installed" and under details it lists: /Device/NTPNP_PCI0023. My question is: How or where can I find this driver? Thank you!