CPU: Intel Core i3/ i5/ i7 Processor Intel Pentium Processor OS: Genuine Windows 7 Home Premium Genuine Windows 7 Professional Display: 14.0" WXGA HD 1366 x 768 LED back-light System Memory: 2GB/4GB DDRIII (Max 4GB) Chipset: Mobile Intel HM55 Express Chipset Video Graphics: Intel HD Graphics with dynamic frequency Hard Disk Drive: 320/500GB 2.5" 9.5mm SATA HDD 5400rpm Optical Disk Drive: 12.7mm Super Multi DVD RW I/O Port: USB(2.0)*3, HDMI, D-sub, RJ45, RJ11(Optional), Mic-in, Earphone-out, 4-in-1 Card Reader(SD/MMC/MS/MS Pro), DC-in Jack Audio: 1.5 Watt Speakers*2, Internal Mic-in Communications: LAN: 10/100/1000Mbps Ethernet Base-T Wireless LAN: 802.11b/g/n Wireless Bluetooth: optional 3.5G Module: N/A Webcam: 1.3 Mega Pixel Security: Kensington Lock Battery: Li-ion, 4-cell,2200 mAh Dimension: 342(W) x 235(D) x 32.4(H)mm Weight: ~2.34kg (w/ODD and 4-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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