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If you are installing windows 8 and 10 64 bit on a acer aspire 5742Z laptop you will have 1 driver that will be missing in device manager. For windows both operating systems that driver is PCI simple communications controller and the correct device is Intel management engine interface. For windows 8 and 10 you can download it here. For windows 7 there are 3 missing drivers, they are Network controller, PCI simple communications controller and Ethernet controller. They correct drivers are Broadcom netlink(TM) gigabit ethernet, Intel management engine interface and Broadcom wifi.

Don't forget the correct power supply for this laptop is 19v 3.42a 5.5mm 1.7mm