My Ex knows a lot about computers - I know nothing about the hardware and infrastructure... I bought my own personal MacBookAir for my private use only. I'm not able to change some settings or be the "administrator". Here are system preferences snapshots under Security and Privacy. It seems to look like I'm on a network under "WINS" (?) and I can't change anything in "Proxies" or "802.1X"
I turned on FireVault (with a recovery key) and FireWall. I also set a login password, required immediately, and only allow apps from the Apple Store. The other pics are my WiFi setting and Directory Utilities if it's helpful. I have Komros installed and Avast and use them every time I log-on. Thank you!