Network adapter DNS server keeps resetting

One time, going through Control Panel's Network Adapters page, I changed the DNS server my computer uses to 8.8.8.8: However, at one point, DNS stopped working for me with 8.8.8.8; I don't really care why, because I was just able to change it to 1.1.1.1: However, consistently, whenever I connect to this particular WiFi network ( eduroam ), it changes back to 8.8.8.8, my Internet stops working, and I have to change it back to 1.1.1.1. It then proceeds to work for a while, until it changes itself back to 8.8.8.8 and breaks again. I would like to make my internet stop resetting itself to use 8.8.

Question by pigrammer on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.