I have tried restarting, turning airplane mode on and off, running the Network Troubleshooter (it doesn't find anything), checking the network adapter driver (it is always up to date already), and doing a network reset.
I am not a computer expert so I don't know what else to try. I just keep reverting to the previous version of Windows every time it updates, but I would like to know if this is an issue with the laptop or whether there is some other step that needs to be tried. And since I can't connect to the internet once the update installs, it's kind of hard to troubleshoot at that point. Thanks.