First and again first of all, this is my suggestion base on my analysis for this model. Install and report back the progress.
1.If you hear sound and can connect to wireless no need to install wireless and audio drivers.
2.If at the device manager there are no yellow mark on graphics no need to install unless you see the screen pixel or low performance.
3. Right click on the installation file and select "run as administrator" to install.
CHIPSET:
IntelChipset SW Installation Utility for windows 7
DownloadIntel Video Driver.
Intel Media accelerator 4500M
Download (windows 7)
Download (Windows Vista)
or
Automatically detect driversRealtek Card Reader.
DownloadBluetooth Driver: (7/Vista/XP)
DownloadBluetooth Stack For windows 7
DownloadRealtek Wireless LAN
DownloadAtheros Wireless LAN
DownloadIntel Wireless LAN (Vista, 7)
DownloadIntel Matrix Storage Manager
Download Windows 7
Download Windows XP/Vista/7
Toshiba HDD protection for Windows 7
DownloadModem Driver Windows 7
DownloadMODEM Set Region (windows xp/vista and 7)
DownloadWEBCAM Application for Windows 7/Vista/XP
(32-bit 64-bit)
DownloadTouchpad (windows 7)
DownloadRealtek Audio Drivers
(32-bit 64-bit)
Download
Toshiba Satellite L770D-10G Drivers for Windows 7(64bit) Sound Driver Realtek Sound Driver Driver Version : 6.0.1.6289 Driver Size : 82.9 MB...
Positivo Unique N3100 Drivers for Windows XP, Windows 7 (31/64bit) ON-BOARD WIRELESS Windows XP Download ON-BOARD REDE ...