OS: Genuine Windows 7 Home Premium Genuine Windows 7 Professional CPU: Intel Core i3 / i5 / i7 Processor(Ivy Bridge) Display: 15.6" 1366x768 LED backlight System Memory: 2GB/4GB DDRIII, 2 slots(Max 8GB) Chipset: Mobile Intel HM76 Express Chipsets Video Graphics: Intel HD Graphics 4000 NVIDIA GeForce GT640M 2GB Supports NVIDIA Optimus Technology Storage: 320/500/640/750GB 2.5" 9.5mm SATA HDD 5400rpm Optical Disk Drive: 12.7mm Super Multi DVD RW 12.7mm Blu-ray ODD support (optional) I/O Port: USB(2.0)*2, USB(3.0)*2, HDMI, D-Sub, RJ45, Mic-in, Earphone-out, 6-in-1 card reader(SD/MMC/MS/MS Pro/SDXC/SDHC), DC-in jack Audio: 2 Watt Speakers*2, Internal Mic-in Communications: LAN:10/100/1000Mbps Ethernet Base-T Wireless LAN:802.11b/g/n Wireless Bluetooth:Bluetooth V4.0 Webcam: 1.3 Mega Pixel Security: Kensington Lock Battery: Li-ion 8-cell, 4400mAh Dimensions: 380(W) x 262 (D) x 29.1~34 (H) mm Weight: ~2.8kg(w/ODD and 8-cell battery) Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.
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