Conor_5 :
Would one of those usb's that act as a Wi-Fi network connector work for being able to use the internet to update?
That might help, but it's problematic that your network adapter does not show up in the device manager. It should at least show up as an unknown device. If it's not showing up, no amount of updating drivers will make it work. It could have been disabled in the bios or be physically damaged. You might try resetting your bios/CMOS. There may be a button or jumper pins--or you can unplug everything and remove the coin-like battery for a few seconds. That should set your bios back to default. If the network adapter still doesn't show up, you will need a new one.