HP EliteBook 820 G3 Notebook PC Driver

Operating system
Windows 7 Professional 64 (available through downgrade rights from Windows 10 Pro 64)
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Processor family
Intel® Core™ i5 processor
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Processor
Intel® Core™ i5-6200U with Intel HD Graphics 520 (2.3 GHz, up to 2.8 GHz with Intel Turbo Boost Technology, 3 MB cache, 2 cores)
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Chipset

Chipset DriverChipset is integrated with processor
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Memory
4 GB DDR4-2133 SDRAM (1 x 4 GB)
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Memory slots
2 SODIMM
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Internal drive
500 GB 7200 rpm SATA
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Display
12.5" diagonal HD SVA anti-glare slim LED-backlit (1366 x 768); 12.5" diagonal FHD UWVA anti-glare ultra-slim LED-backlit (1920 x 1080); 12.5" diagonal FHD UWVA ultra-slim touch screen (1920 x 1080) [13]
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Graphics

VGA Driver: AMD Rev.A; AMD Rev.F; Intel Intel® HD Graphics 520
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External I/O Ports
1 USB 3.0; 1 USB 3.0 charging; 1 USB Type-C™; 1 DisplayPort; 1 VGA; 1 headphone/microphone combo; 1 AC power; 1 RJ-45; 1 docking connector
.
Expansion slots
1 media card reader; 1 external SIM
Supports SD, SDHC, SDXC.
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Audio

Conexant Audio DriverAudio by Bang & Olufsen; Integrated dual array microphone; Integrated premium speakers; HP Noise Reduction Software; HP Clear Sound Amp
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Webcam

Camera Driver

720p HD webcam
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Keyboard
Spill-resistant backlit keyboard and drain
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Pointing device

Touch Driver

Synaptic Fingerprint Driver

Intel HID Controller Driver

Synaptic Mouse Driver

Glass touchpad (with chemically etched surface) with on/off button, supports 2-way scroll, taps and gestures enabled by default, two-finger scrolling, two finger zoom (pinch), Pointstick
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Wireless technology

Wifi DriverIntel Dual Band Wireless-AC 8260 802.11a/b/g/n/ac (2x2) WiFi and Bluetooth® 4.2 Combo
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Power supply
45 W Smart AC adapter
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Battery
HP Long Life 3-cell, 44 WHr Li-ion polymer
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Battery life
Up to 7 hours and 15 minutes (3-cell, 44 WHr) (models with HDD)
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Dimensions (W X D X H)
12.2 x 8.6 x 0.74 in (non-touch); 12.2 x 8.6 x 0.8 in (touch)
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Weight
Starting at 2.78 lb (non-touch); Starting at 3.05 lb (touch)
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Warranty
1 year standard parts and labor limited warranty, depending on country (upgrades available), 1 year limited warranty on primary battery
.
Software included
HP 3D Driveguard; HP BIOSphere with HP Sure Start; HP Client Security; HP Connection Manager (models with Windows 7 only); HP ePrint Driver; HP Recovery Manager; HP SoftPaq Download Manager; HP Support Assistant; Buy Office; HP Mobile Connect Pro (models with Windows 8.1 and Windows 10); HP Noise Reduction Software; HP Image Assistant[14,15,16,17,18,19,22]
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Security management
Security lock slot (lock must be purchased separately); TPM 1.2/2.0; Integrated smart card reader (active); Preboot Authentication (password, Smart Card); HP Fingerprint reader (optional)

ASUS X551MA Driver

Processor Chipset Driver
Intel® Bay Trail-M Dual Core Celeron N2815 Processor,
Intel® Bay Trail-M Quad Core Celeron N2910/N2920 Processor,
Intel® Bay Trail-M Quad Core Pentium N3520 Processor,
.

Operating System
Windows 8 Pro
Windows 8

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Memory
DDR3 1333/1066 MHz SDRAM, up to 4 G
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Display
15.6" 16:9 HD (1366x768) Glare panel

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Graphic
VGA Driver
Integrated Intel® HD Graphics

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Storage
Up to
- 1TB 5400 RPM

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Optical Drive
Super-Multi DVD (Optional)

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Card Reader
2 -in-1 card reader ( SD/ MMC)
Card Reader Driver

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Camera
VGA/HD Web Camera (Optional)

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Networking
Wireless Driver: Qualcom; Ralink; Broadcom; Realtek
Integrated 802.11 a/b/g/n/ac or 802.11 b/g/n (On selected models)
Built-in Bluetooth™ V4.0 (Optional) Bluetooth Driver: Qualcom; Realtek; Ralink; Broadcom
10/100 Base T

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Interface
1 x COMBO audio jack
1 x USB 3.0 port(s) USB 3.0 Driver
1 x USB 2.0 port(s)
1 x RJ45 LAN Jack for LAN insert LAN Driver
1 x HDMI
1 x SD card reader Card Reader Driver
1X AC adapter plug
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Audio, 
Audio Driver
Built-in Speakers And Microphone
ASUS SonicMaster Technology
MaxxAudio support

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Battery
3Cells 3000 mAh 33 Whrs

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Power Adapter
Output :
19 V DC, 1.73 A, 33 W
Input :
100 -240 V AC, 50/60 Hz universal

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Dimensions
380 x 251 x 30.9 ~36.59 mm (WxDxH)
Weight
2.15 kg (with 3 cell battery)

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Security
Kensington lock

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Manufacturer Warranty
2-year limited International hardware warranty. *different by country
OS (Windows® 8 ) install/uninstall consultation
ASUS software supporting
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Thanks fro downloading here!!