Basically, this is what happened with minimal scrutinous details:
Avast! detected malware threat and offered to "lock in Chest."
After this happened, I was prompted to restart my system and
perform a Boot-Time scan prior to rebooting it. I obliged,
and let the Boot-Time scan run. After returning, my internet connect
was disabled, as well as my Internet protection shields.
Also, internet in the rest of my house works, and my computer is bug free.
I've called my ISP, so it's not the connection error either.
Is this a common
problem, and how do I diagnose and fix it?
TL;DR: Internet worked fine. After malware threat, boot-time scan was performed.
Boot-time scan disabled internet connection. How do I fix it?