So. There's something I remember from a long time ago... Called PC Accelerate Pro.
https://allaboutcookies.org/what-is-pc-accelerate-pro
It's a fake antivirus software. I got this by trying to download a free version of a paid game on Steam. It was bundled with it. Now, I was like... uhh, 11-12 at the time..? So when I got this pop-up..
..Me, being the naive lil boy I was, got scared into searching up a free antivirus software and inadvertently... downloaded ANOTHER, fake antivirus software called Segurazo (Also SAntivirus)! Look it up because I'm not going to add another link (Sorry lol). Now, I was REALLY scared! One day my mum found out about this and added McAfee to remove these. I regret that decision and since then, I chose to always be suspicious of fake software and stuff like that. I don't know why I posted this really, I guess I just needed to get it off my chest... Sorry.
TL/DR; I downloaded fake antivirus software and regretted it.