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After installing windows 8 and 10 on a HP ENVY 15-J140NA laptop there are 8 missing drivers. These are 3D video controller, BCM20702AO, Unknown device x4, PCI device, PCI simple communications device, SM bus controller. The correct drivers are Nvidia HD graphics, Bluetooth, Intel HD graphics, Realtek card reader, Realtek ethernet controller driver, Intel chipset device, validity fingerprint driver, Intel smart connect driver. click each to download. For bluetooth update windows operating system. Don`t forget the correct power supply is 19.5V 4.62A blue tip