Since Foxconn's official support site for these legacy products is no longer active, you should use drivers from the component manufacturers or reputable archives:
from the Device Manager, you finally find the generic Realtek drivers that Windows 7 can actually use. How to Finish the Story (Manual Installation) Foxconn N15235 Lan Driver Windows 7 32bit
Most boards marked N15235 use one of two main network controllers. Once you know which one you have, you can download the driver directly from the chip manufacturer for better compatibility with Windows 7 32-bit: Realtek PCIe FE/GbE Family Controller : This is the most common LAN chip for these boards. Driver Source : You can often find generic Realtek drivers on the Realtek Official Site or through legacy repositories. Atheros Ethernet Controller Since Foxconn's official support site for these legacy