I installed a driver for an Ethernet adpater I purchased which asked for security permissions and I accepted. The setup asked to reboot my Mac and I did so but now after logging back in my Mac shows no hardware installed. I have tried smc and nvram methods. Please help I don't want my computer to be unusable. The entire network section glitches out when I try to do anything and nothing shows up when I click on network and it takes me to nothing. Please help.