Best Anti Virus

Avast?

Baidu.

Common sense.

I used Kaspersky years ago and it was good , but now i'm using avast and everything is going perfect x)

I use webroot myself

ESET NOD32 is the best : )

Depending on AV software is not among the best of security practices.

I'm currently using Webroot, it's really light on resources and works pretty well.

I used to use Avira a long time ago, now a use Comodo which has did very good for me over the years and caught a few things for me.

Antivirus once you are infected? Sorry , but good luck with that :(

There are tricks to avoid detection to any antivirus ( there is a black market out there) , so is mostly common sense (No man sky is not 932kb in size) , an up to date backup, and ready to format your pc (and never, ever use usb keys from other people).

On the other hand, Panda Antivirus somewhat works fine (even if is worse than Chrome at using resources)

I use Avast, add blocker and common sense. That combo tends to work fine.
Also, how does she reads anime?

Norton 360

also install Adblock and Malwarebytes

nod32 :3

Burp! I use ZitAlarm.

PC Optimizer Pro
then delete system32
I use BitDefender

The best anti-virus that I know is a healthy diet.
(But in all seriousness, I'm using Windows Defender and that had done well for me)

Common sense, unfortunately :-/

No antivirus will keep a luser safe from harm.

Since you've mentioned it's more of an adware problem, I would recommend Adwcleaner (works really well if the computer is infected). I personally uses it and it works really well, imo.
For Antivirus though, most of the free ones doesn't work all that well. I'd say Kaspersky (trial), 360, and Avast are the best ones in the "free to use" antivirus program category.

From my experience NOD32 is the best, followed by Kaspersky by close. If you are gonna pay I would recommend you any one of those two.

I also too don't use an antivirus because I mainly don't have anything important on this machine and I format it from time to time, but beware, there are a lot of ways that an intruder gets to you, and I don't mean viruses, adwares, ransomware; I mean stuff like botnets or real intruders. And most of the times an antivirus/firewall could protect you from some forms of this. So after a time of seeing vulnerabilities exploited I came to the conclusion that antivirus/firewall are a somewhat "good" kind of software. At least in windows environment where the majority of attacks happen to normal people.

Kaspersky, but it's not cheap :(

until you get the PC clean of ALL viruses/malware/adware, no anti virus is going to do much to help you. Out of your list, Kaspersky would be my recommendation. There are many that are effective, though. Even MS Defender is decent now at protecting you from getting a virus. Add in adblock/malwarebytes (pro) for additional protection.

I'd also try to teach (though I share 100% in your pain, here) her to not to click on every freaking thing that pops up on the screen (hope you have better luck than I did)