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After installing windows 7 on a SAMSUNG RV515 laptop there are 2 missing drivers. These are Network controller and Ethernet controller. The correct drivers are Broadcom Wifi dhxb-81 and Realtek ethernet. Click each to download. For windows 8 and 10 the PCI simple communications controller is missing. The correct driver is Intel engine management which you can update in device manager or update os.
Don`t forget the correct power supply is 19v 3.16a