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On February 2014, Some one needs my help to downgrade operating system from Windows 8 to windows 7. Before instal windows 7 on Lenovo Ideapad G400s, i check specification and also check driver support in it. First, i do not sure that all driver can be installed and success on windows 7, but i  try to test it.

The result after instal Windows 7. We need some driver to instal them. I download the driver from lenovo source, finally all drivers successfully installed.



Note:
There are twoo type of VGA on  Lenovo G400s.

1. VGA Graphic with Intel HD 4000 Graphic series
2. VGA Graphic with NVIDIA® GeForce® GT720

Note:
I suggest  to instal driver as needed laptop only. Installing all software or driver on laptop, it can make laptop work slowly.

Lenovo ThinkPad Edge laptop has released series E420 1141BTU which would require drivers and software to supports the operating system. If you need Lenovo ThinkPad Edge E420 1141BTU drivers and software for Windows 7, here are Lenovo ThinkPad Edge E420 1141BTU drivers and software you can download. Lenovo ThinkPad Edge E420 1141BTU drivers are available online and you can download directly from Lenovo website. If you want to install Windows 7 operating system to your Lenovo ThinkPad Edge E420 1141BTU laptop, then you have to own these drivers.

As described at Lenovo website, the Lenovo ThinkPad Edge E420 1141BTU laptop is powered by a Intel® Core™ i3-2310M processor (dual-core, 2.10GHz, 3MB Cache), Supports two 1066/1333 MHz DDR3 SDRAM SO-DIMM, 4 GB / Maximum Memory: 8 GB, HT technology, innovative Express Cache which is the newest technology with very fast performance and best in class.

Laptop Lenovo ThinkPad Edge E420 1141BTU integrated with Intel HD Graphics 3000 in processor be accompanied a SuperBright screen 14-Inch LED LED backlight Display to produce sharp clear images, even outdoors, External analog monitor support via VGA DB-15 connector and digital monitor support via HDMI (supporting HDCP to output protected content), Max external resolution: 2048x1536 (VGA)@75Hz, 1920x1200 (HDMI)@60Hz. And also equipped with Storage 500GB/7200rpm Hard Drive Capacity with ExpressCache™ Technology SATA 3.0Gb/s, High Definition (HD) Audio, Conexant 20671 codec / stereo speakers, 1 watt x 2/ mono digital microphone, Combo audio/mic jack, TouchPad (Selected Models only), Two PCI Express Half Mini Card slots, ThinkPad 11b/g/n, PCIe Half Mini Card, Realtek® chipset, 1x1, 11b/g/n, PCIe Half Mini Card, Intel Centrino® Wireless-N 1000, 1x2, Intel Centrino Advanced-N + WiMAX 6250 2x2, Bluetooth 3.0 wireless, Realtek RTL8111E Gigabit Network Connection, One USB 2.0/eSATA combo port, External monitor (VGA DB-15, HDMI), Ethernet (RJ-45), iPod/Blackberry charge function support: designated port, Blu-ray-ROM/DVD-RW/CD-RW BD Drive, IBM External USB Floppy Disk Drive, 9-cell: up to 11.7 hr, and running on Microsoft Windows 7 Home Premium Edition (64-bit) for operating system, provide ultra-responsive performance to run multitasking simultaneously.


We do not affiliate at any case to the notebook drivers download owners Releaser. We just wanna help and share any free drivers download. All the Properties and Trade Marks are belong to the Copyright Holder.

Download Lenovo ThinkPad Edge E420 1141BTU drivers for Windows 7 64bit below :

BIOS

ThinkPad BIOS Settings Capture/Playback Utility Version 1.05
[download]

AUDIO

Conexant Audio Version 8.32.27.00
[download]

Bluetooth and Modem

Bluetooth with Enhanced Data Rate Software II Version 6.4.0.2900
[download]

Camera and Card Reader

Integrated Camera Driver Version 1.1.0.1147/1.11.1101.3
[download]
Ricoh Multi Card Reader Driver Version 2.14.18.01
[download]

Chipset

Intel Chipset Device Software Version 9.2.0.1019
[download]
Intel Management Engine Interface Version 7.0.0.1144
[download]

Diagnostic

Lenovo Hard Drive Quick Test Version 1.0.1
[download]

Display

Lenovo Screen Reading Optimizer Version 1.16
[download]
Intel Wireless Display Version 2.1.41.0
[download]

Fingerprint reader

Fingerprint Software 5.9.5 Version 5.9.5.7038
[download]

Mouse and Keyboard

Synaptics UltraNav Driver Version 15.3.39.1
[download]

Networking Ethernet

Enabling Wake on LAN from Standby for ENERGY STAR Version 4.0
[download]
Realtek Giga LAN Driver Version 5.780.1228/7.37.1229
[download]

Networking Wireless WAN Firmware

Ericsson F5521gw Wireless WAN Firmware Version R3B01
[download]
Ericsson F5521gw/F3607gw Wireless WAN Driver Version 6.5.1.5
[download]

Networking Wireless LAN

Intel Wireless LAN (bg, abg, 11abgn) Version 14.03.0000
[download]
ThinkPad 2x2 11a/b/g/n Wireless LAN PCI Express Half Mini Card Adapter Version 5.100.82.94
[download]
ThinkPad 1x1 11b/g/n Wireless LAN PCI Express Half Mini Card Adapter Version 1005.18.0413.2011
[download]
Intel WiMAX 6250 AGN Version 6.05.0000
[download]

Power management

Power Manager Version 3.67
[download]
ThinkPad Power Management driver Version 1.64
[download]

Security

Lenovo AutoLock Version 1.05
[download]
Intel IPT - Identity Protection Technology Version 1.1.2.0
[download]

Software and Utility

RapidBoot Version 1.12
[download]
Hotkey Features Integration Version 3.70.0003
[download]
Utility To Read and Write Asset ID Information for DOS - ThinkPad Version 1.01
[download]
Utility To Read and Write Asset ID Information for Windows 7 Version 1.01
[download]

Storage

Intel SATA Controller AHCI Driver Version 10.1.0.1008
[download]
RapidDrive Advanced Uninstallation Tool Version 1.00.06
[download]
ThinkPad Drive Erase Utility for the Resetting the Cryptographic Key and the Erasing the Solid State Drive (Bootable CD)83fd02ww.iso Version 1.01
[download]
ThinkPad Drive Erase Utility for the Resetting the Cryptographic Key and the Erasing the Solid State Drive (Floppy) Version 1.01
[download]

ThinkVantage Technology

ThinkVantage System Update 4.03 Version 4.03.0007
[download]
ThinkVantage Active Protection System Version 1.75
[download]
Lenovo Solution Center - Desktops / Notebooks / WorkStations Version 1.1.003
[download]
ThinkVantage GPS Version 2.73

[download]

Client Security Solution 8.3 Version 8.30.0053.00

[download]

ThinkVantage Communications Utility Version 2.09

[download]

ThinkVantage Access Connections Version 5.85

[download]

Password Manager 4.0 Version 4.00

[download]

Password Manager 4.0 Auto Upgrade Tool Version 4.00

[download]

Hotfix patch for System Update Version 1.0

[download]

Registry Patch to Disable AMT Profile Synchronization Pop-up Version 1.00

[download] 

Video

ThinkPad Video Features (Intel and AMD muxless PX4.0) Version 8.882.2.3000 / 6.14.0.3074

[download]

Intel HD Graphics (Integrated) Driver Verison 8.15.10.2509

[download] 

Windows Update

Windows Update Module KB979155 (WW) - ThinkPad Version 1.00

[download]

Windows Update Module KB979903 Version 1.00

[download]

Windows Update Module KB2292867 (Windows 64-bit) Version 1.00

[download]

Windows Update Module KB981351 (WW) - ThinkPad Version 1.00

[download]

Windows Update Module KB981112 (WW) - ThinkPad Version 1.00

[download]

Windows Update Module KB975599 (WW) - ThinkPad Version 1.00

[download]

Windows Update Module KB975851 (WW) - ThinkPad Version 1.00

[download]

2.26GHz Intel Core 2 Duo P8400 Processor, 2GB 204 Pin PC3-8500 DDR2 So-Dimm RAM (2 slots), 250GB SATA 5400RPM Hard Drive, DVD+/-RW Drive; Finger Print Reader, 15.4" (1280 X 800) 16:10 Display, Intel GMA 4500MHD Graphics, Up to 6.3 Hours of Battery Life.

Download Lenovo ThinkPad T500 Drivers for Windows 7

4th Generation Intel Core i7-4510U Processor (3.10GHz Turbo, 2.00GHz Base 1600 MHz 4MB), 1TB Hard Drive / Windows 8.1 / Intel Dual Band Wireless-AC 3160, 15.6" Full HD 1080p LED Glossy Display (1920x1080) / NVidia 820M 2GB Graphics Card, DVD Recordable Drive (Dual Layer) / Bluetooth Version 4.0, 8.0GB PC3-12800 DDR3L SDRAM 1600 MHz Memory.