Ever since I had a run in with what I though must have been a virus 5 or 6 months ago, I've been rediculously cautious with my new custom built computer. One time I was making tabulature on TuxGuitar and all of a sudden, notes are getting moved and misplaced and stuff and then a save dialogue box comes up and words and stuff in what looked like coding were being typed. All the while I'm combating it by hitting a bunch of buttons and backspace a whole lot. It stopped but I was scared stuffless, and disconnected my Ethernet, just in case I was being hi-jacked. Malwarebytes came up with nothing, and neither did BitDefender, which didn't help my rising anxiety. Multiple days went by where I'd just let my computer be scanned (scan took for-loving-ever) in hopes I'd remove something malicious. Thinking it may have also been a key logger, I started changing passwords like crazy on my iPhone. I never had that kind of episode again on that computer, but I was still really cautious.