Ok, I talked to her on the phone again and it turns out it was just one of those malicious browser pop-ups that won't let you close them. I guess windows update ran and automatically restarted the machine, force closing the browser. After the restart she said everything was fine. I explained to her how to end a task in case it happens again and had her run CCleaner to get rid of any rotten cookies.
The only security I have set up on the machine is Defender, Malwarebytes Anti-Exploit, and Adblock Plus. Is there something better suited to prevent those kind of pop-ups that won't bog the hardware down?
Thanks for all the replies.
Get rid of Adblock Plus. They blatantly copied the original author of Adblock, and he had to change the original/best version of Adblocker to something else. It's now called "Betafish Adblock" (though Chrome still calls it Adblock on the extension page.) Anyways, get this one instead. It works MUCH better and uses less resources.
As for "Adblocking Software" - I'd honestly consider taking a bit of a system slowdown. Why? Well, I'm not a parent. But I feel I can safely assume that there's plenty of things on the Internet I wouldn't want a child seeing (although you didn't say how old your daughter is. But I'm assuming she's in her pre-teens or younger. If that's the case...). I grew up right when the internet was just starting to boom (were talking 1998-2004 here). Website/adblockers were non-existent during this period.
As a child I was fascinated by computers. Just absolutely obsessed with everything about them (tbh I still am, but that's beside the point). I learned all the engeineering behind computers, how the components fit together, how hardware isn't the only requirement - but rather software is needed to tell the hardware what to do. Etc... Because of this - my dad gave me his old Desktop computer when he got a new one. I was maybe 6 years old? But I believe 5.
My dad wanted me to have my own email. Not because I needed one, but because he knew that I would find the transfer of messages over a wire fascinating. So, I had a computer in my room, with Internet at the age of 5 (or 6). I accidentally stumbled upon many things that a child my age had no business of knowing. Actually... I should say; as I've gotten older (I'm now 19) I realized that what was so much fun about being a kid, was not having to worry about certain real world concerns. And having unfiltered internet access from the ages of 5-13 took much of the innocence out of my childhood.
Due to personal reasons - I'd rather not give examples. But looking back... I don't think letting me have unrestricted access to the internet was a wise choice for my parents to make (also I just realized I sound like I'm trying to tell you how to raise your child. That's not my intention :/ so sorry if this has come on that way).
Anyways, why do I think that? Because of the Internet showed me, very vividly, in a way anyone of any age could understand; the vulgarity and seriousness of the real world. As a child I was unprepared for any of this information. Looking back I believe it greatly impacted the amount of friends I had in school, my socialability, and much more that I probably haven't even realized. But learning about the dangers of the real world made me paranoid to step outside for YEARS.
I will give one example actually. My parents, and in school - always said "Don't talk to strangers. Don't accept candy from strangers. Don't get into cars with strangers." etc. Well the Internet made it clear as day WHY I should never do that. I learned as a 6 year old kid, about pedophiles, murders, and human trafficking. I was not equipt to know any of that knowledge at the age of 6.