Source : support.lenovo.com
Download Lenovo Ideapad S400 Notebook Drivers Windows 7 32/64bit drivers, Utility, Update
| Name | Size | OS | Version | Released | Download |
| Realtek Audio Driver | 163MB | Windows 7 32bit | 6.0.1.6657 | 22-Jul-12 | Download |
| 1bau05ww.exe | Windows 7 64bit | ||||
| Intel Wireless Music Driver | 4.65MB | Windows 7 32bit | 1.6.0.2 | 22-Jul-12 | Download |
| 1bmu02ww.exe | Windows 7 64bit | ||||
| Bluetooth Driver (CyberTan, Liteon, Intel) | 664MB | Windows 7 32bit | 6.5.1.2700/7.4.0.135/ 2.1.1.0153(Driver 2.0.15.30150) | 22-Jul-12 | Download |
| 1bbt06ww.exe | Windows 7 64bit | ||||
| Camera Driver (Bison, Chicony, AzureWave) | 32.2MB | Windows 7 32bit | 1.12.320.1/3.3.3.31/ 13.11.1206.1/6.1.7600.164 | 22-Jul-12 | Download |
| 1bca10ww.exe | Windows 7 64bit | ||||
| Realtek Card Reader Driver | 11MB | Windows 7 32bit | 6.1.7601.39019 | 22-Jul-12 | Download |
| 1bcr01ww.exe | Windows 7 64bit | ||||
| Intel Management Engine Interface | 53.5MB | Windows 7 32bit | Software: 8.0.3.1427/Driver: 8.0.0.1262 | 22-Jul-12 | Download |
| 1bme02ww.exe | Windows 7 64bit | ||||
| Intel Chipset Driver | 2.48MB | Windows 7 32bit | 9.3.0.1020 | 22-Jul-12 | Download |
| 1bcs02ww.exe | Windows 7 64bit | ||||
| Intel Wireless Display Driver | 214MB | Windows 7 32bit | 3.1.29.0 | 22-Jul-12 | Download |
| 1bdi03ww.exe | Windows 7 64bit | ||||
| Hotfix for 64-bit Windows | 516KB | Windows 7 64bit | KB2496820 | 25 Nov 2012 | Download |
| qfyj01ww.exe | |||||
| Hotfix for 32-bit Windows | 506KB | Windows 7 32bit | KB2496820 | 25 Nov 2012 | Download |
| qfyl01ww.exe | |||||
| Hotfix for 32-bit Windows | 1.39MB | Windows 7 32bit | KB2482122 | 25 Nov 2012 | Download |
| qfwx01ww.exe | |||||
| Realtek LAN Driver | 5.86MB | Windows 7 32bit | 7.54.309.2012 | 22-Jul-12 | Download |
| 1bla03ww.exe | Windows 7 64bit | ||||
| Intel Wireless LAN Driver | 1.12GB | Windows 7 32bit | 15.1.0.18 | 22-Jul-12 | Download |
| 1bwl03ww.exe | Windows 7 64bit | ||||
| Wireless LAN Driver (CyberTan, Liteon) | 75.2MB | Windows 7 32bit | CyberTan:3.2.9.0/ Liteon:5.100.82.139, 9.2.0.502 | 22-Jul-12 | Download |
| 1bwm05ww.exe | Windows 7 64bit | ||||
| Intel WiMax Driver (6150NX MOW) | 90.3MB | Windows 7 32bit | 7.0.1010.26 | 22-Jul-12 | Download |
| 1bwo01ww.exe | Windows 7 64bit | ||||
| Intel WiMax Driver (6150NX BSB) | 90.3MB | Windows 7 32bit | 7.0.1010.26 | 22-Jul-12 | Download |
| 1bwn01ww.exe | Windows 7 64bit | ||||
| Lenovo Energy Management | 21.3MB | Windows 7 32bit | 7.0.3.9 | 04-Jun-12 | Download |
| cagt32ww.exe | Windows 7 64bit | ||||
| Intel Rapid Start Technology | 2.12MB | Windows 7 32bit | 1.0.0.1022 | 22-Jul-12 | Download |
| 1brs03ww.exe | Windows 7 64bit | ||||
| Intel Rapid Storage Technology | 11.4MB | Windows 7 32bit | 11.1.0.1006 | 22-Jul-12 | Download |
| 1bst02ww.exe | Windows 7 64bit | ||||
| TouchPad Driver (Synaptics, Elan) | 271MB | Windows 7 32bit | 16.1.8.0/11.4.1.1 | 22-Jul-12 | Download |
| 1btp06ww.exe | Windows 7 64bit | ||||
| Intel USB 3.0 Driver | 5.41MB | Windows 7 32bit | 1.0.4.225 | 22-Jul-12 | Download |
| 1bus03ww.exe | Windows 7 64bit | ||||
| Intel Graphics Driver | 150MB | Windows 7 64bit | 8.15.10.2712(HD Audio: 6.14.0.3090) | 22-Jul-12 | Download |
| 1bvh04ww.exe | |||||
| Intel Graphics Driver | 124MB | Windows 7 32bit | 8.15.10.2712(HD Audio: 6.14.0.3090) | 22-Jul-12 | Download |
| 1bvg04ww.exe | |||||
| AMD Graphics Driver | 468MB | Windows 7 64bit | 8.933.3.4000(HD Audio: 6.14.0.3090) | 22-Jul-12 | Download |
| 1bvi05ww.exe | Windows 7 32bit | ||||
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