Source : support.dell

Download DELL Inspiron 14R SE 7420 Notebook Driver Windows 8.1 64bit

Drivers	Links
Dell Quickset Application (Application) v. 11.1.45, A00	Download
Conexant Audio driver (Driver) v. 8.54.40.0, A00	Download
Dell Inspiron 7420 System BIOS (BIOS) v. A19 Descr	Download
Intel Chipset Driver (Driver) v. 9.4.0.1026, A00 for DELL Inspiron 14R SE 7420 Notebook	Download
Intel Management Engine Interface Driver (Driver) v. 9.5.14.1724, A01	Download
Realtek CardReader driver. (Driver) v. 6.2.9200.39050, A00	Download
ALPS Touchpad Driver (Driver) v. 8.1200.101.218, A00	Download
Dell Wireless 1703/1901 Wi-Fi + BT Driver (Driver) v. 10.0.0.263, A00	Download
Dell Wireless 1704 802.11b/g/n (2.4GHz), BT 4.0+HS Driver (Driver) v. 6.30.223.143, A00	Download
Intel 2230/6235 Wi-Fi + BT v4.0 + HS Adapter Driver (Driver) v. 3.1.1307.360, A00	Download
Intel Rapid Storage Technology Driver (Driver) v. 12.8.2.1000, A00	Download
Intel HD Graphics 4000/2500 Driver (Driver) v. 10.18.10.3277, A00	Download
nVIDIA Geforce Graphics Driver (Driver) v. 9.18.13.2660, A00	Download