Friend can't connect to internet after updating NVidia GPU driver and restarting computer

A friend of mine is panicking after updating their NVidia driver on a 1080 and all a sudden, that computer keeps getting a DNS server error while their other devices work fine. The flushdns command hasn't worked, saying that the operation cannot be performed while media is disconnected. Restarting the modem didn't do anything, either. They need to get their computer up soon to do work for school. Are there any fixes?

​

Thanks.