I'm sorry for the problems you're getting with this laptop, seems never ending. Can you try to uninstall the drivers in safe mode first? That might do it. To return to factory settings, boot the laptop, insert first disk, shut down the laptop (holding down the power button will do). Start the laptop and press any key when it asks for it, to boot to the DVD. It should be already set to boot from the DVD in the bios.
OnePlus 5 review