All driver compatible with Windows 7 32 and 64 bit (starter/home/home premium/professional/ultimate..) unless i provide separate download links. I try my best to create a post which provide drivers to all HP-G4 model.

READ FIRST:
1. Installing Driver: Download base on AMD and Intel model
HP Pavilion G4 - xxxxUS : Intel model
HP Pavilion G4 - xxxxCA : Intel model
(intel model install all driver)

HP Pavilion G4 - xxxxNR : AMD Model
HP Pavilion G4 - xxxxXX : AMD Model
HP Pavilion G4 -xxxxDX : AMD Model
(Install all except Intel chipset ()

2. Graphic Driver
There are different graphic driver across HP Pavilion G4 model, so here i listed the most driver wok with this model. At the end of the post i will provide alternative driver if the driver below didn't work.

Most of the HP G4 model use AMD graphic but some of them use Nvidia graphic, you should know the spec yourself (when you buying it, it mentioned in the specs) or test which work for you.

CHIPSET DRIVER - (ALL INTEL DRIVERS):
(install all 3 - for intel model only)

1. Intel Chipset Installation Utility and Driver
Intel (R) 5 Series / Series Chipset Family
, Version, M
Download

2. MEI
Intel Management Engine Interface (MEI) Driver
, Version, M
Download

3. Intel Rapid Technology
Intel Rapid Storage Technology Driver
, Version, M
Download

4. Intel Turbo Boost Technology Driver
, Version, M
Download

AUDIO/SOUND
IDT High-Definition (HD) Audio Driver
, Version, M
Download

GRAPHIC/VGA/VIDEO
(Install Intel Graphic driver first, reboot and Install AMD Graphic Driver)

1. Intel High-Definition (HD) Graphics Driver
, Version, M
Download (32 bit)
Download (bit)

2a. AMD Graphic Driver
AMD High-Definition Graphics Driver
, Version, M
Download

2b. Nvidia Graphic Driver
NVIDIA GeForce GT M
, Version , M
Download 
(Instead of using HP driver, you can use driver from nvidia)
bit download link
bit download link

NETWORK - WIRLESS/WIFI
(There 3 applicable wifi driver, choose base on your specs)
a)Intel Wireless Drivers, Intel PROSet, and Intel My WiFi for Microsoft Windows 7
, Version, M
Download

b)Intel Wireless Drivers for Microsoft Windows
, Version, M (Driver only)
Download

2.  Atheros Wireless LAN Driver
, Version, M
Download

3. Broadcom Wireless LAN Driver for Microsoft Windows 7
, Version, M
Download

NETWROK - LAN/ETHERNET
Realtek Local Area Network (LAN) Driver
, Version, M
Donwload

BLUETOOTH:
bharathealthcares.comom Bluetooth
, Version:7, M
Donwload

bharathealthcares.com Bluetooth Adapter Driver
, Version, M
Download

CARD READER
Realtek Card Reader Driver
, Version, M
Download

TOUCHPAD
Synaptics TouchPad Driver
, Version, M
Download

UTILITIES.
(here i listed the important utilities you need to install (optional), there are alot of utilities for this model, but didn't recomend to use them all)

bharathealthcares.comink YouCam Software
, Version(DE), M
Download

bharathealthcares.com Quick Launch Software
, Version, M
Download

bharathealthcares.com Wireless Assistant
, Version, M
Download

bharathealthcares.com Power Manager Utility Software
, Version, M
Download