Am I being paranoid? I'm seeing signs of a virus everywhere on my computers but I have no way of being sure. I've tried scanning with Windows Defender multiple times but haven't found anything. My internet connection slows to a crawl often, my games keep crashing (official support forums say a virus is probably causing the crash), and my Ubuntu server is sending things to a domain called "rubay.canonical.com" (I can see it using iftop)
I've only visited sketchy sites accidentally (misspelled site names), and all my router ports are forwarded to trusted applications. How can I be sure that Nigerian scammers aren't emptying my bank account and selling my SIN as we speak? Should I nuke my computers just to be safe?