Dell Inspiron 5520 (15R) Windows 7/8 Drivers

1. X86 = 32-bit and x64 = 64-bit version of windows.
2. UPDATE is optional, you can choose either to install or not.
3. Download all drivers and install according to order is recommended. If the driver automatically installed along with windows installation or via windows updates you don't have to download and reinstall the drivers again.
4. Windows 8 drivers comaptible with windows 8.1
5. Official download pages only listed for x64 (64 bit drivers only)
6. Dell FTP download page provide wrong information  about LAN-Ethernet drivers which the description mentioned Realtek LAN drivers as Realtek Audio Drivers.

Chipset
Intel Chipset (HM77) Installation Utility
Version 9.3.0.1020(W7) -  9.3.0.1021(W8)
Windows 7 x86/x64 : Download Driver | Update
Windows 8 x86/x64 : Download

Storage
Intel Matrix@Rapid Storage Manager
Version 11.7.0.1013
Windows 7/8 x86/x64: Download | Update

Graphic
There are 2 applicable graphic drivers which is Intel and AMD@ATI

Intel HD 4000 Graphic Drivers
Windows 7 x86 : Download
Windows 7 x64 : Download
Windows 8 x86 : Download
Windows 8 x64 : Download


AMD Radeon HD 7670M
Windows 7 x86x64 : Download
Windows 8 x86x64 : Download

Audio
Conexant CX20672-21Z High Definition Audio Driver
Version 8.54.37.0(W7) - 8.54.40.0(W8)
For windows 7 if you already have the audio driver you can choose to install update (optional).
Windows 7 x86/x64 : Download Update only| Download Full Driver
Windows 8 x86/x64 : Download 

MEI
Intel Management Interface
Version 8.0.1.1399(W7) - 8.1.0.1248(W8)
Windows 7 x86/x64 : Download Driver | Download Update (optional)
Windows 8 x86/x64 : Download

USB
Intel USB 3.0 eXtensible Host Controller Driver
Version 1.0.7.248(w7) - 1.0.5.235(w8)
Windows 7 x86/x64 : Download Driver | Update
Windows 8 x86/x64 : Automatic (if not, use windows 7 drivers) , latest update and drivers available using Microsoft windows updates for windows 8/8.1.

Card Reader
Realtek RTS5179 Card Reader
Version (w7)6.2.8400.39034 - 6.1.8400.39030(w8)
Windows 7 x86/x64 : Download
Windows 8 x86/x64 : Download

Intel TB
Intel Turbo boost Technology
Version 2.6.2.0(w7) - 2.1.23.0(w8)
Windows 7 x86/x64 : Download
Windows 8 x86/x64 : Download

Touchpad
Dell Touchpad Driver
Version 11.3.3.5
Windows 7/8 x86/x64 : Download

LAN - Ethernet
Realtek RTL8105E-V, Realtek RTL8105E-VL Ethernet Driver
Version 7.054.0309.2012 - 8.002.0612.2012
Windows 7 x86/x64 : Download | Update
Windows 8 x86/x64 : Download

Wireless

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There are more than one (1) wireless drivers, you need to choose base on your specification.

Intel Centrino® Advanced-N 2230 WiFi Driver
Version 15.5.5.47
Windows 7 x86 : Download
Windows 7 x64 : Download
Windows 8 x86 : Download
Windows 8 x64 : Download
(bluetooth utility and driver download link here)

Dell Wireless 1704 Wi-Fi + Bluetooth Driver
Version 6.20.55.58,A03 
Windows 7 x86/x64 : Download
Windows 8 x86/x64 : Download

Dell Wireless 1703/1901 WiFi + Bluetooth Driver 
Windows 7 x86/x64 : Download
Windows 8 x86/x64 : Download

Intel WiFi Link 6150/6250 Driver 
Windows 7 x86/x64 : Download
Windows 8 x86/x64 : automatic

Dell Wireless 1901 Wi-Fi + BT Driver 
Windows 7 x86/x64 : Download
Windows 8 x86/x64 : automatic

Application:

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 Dell Quickset
Version 10.15.012
Windows 7/8 x86/x64: Download