The free Comodo Internet Security gets my vote - - I've been using it on all three computers in my house for 6 years now - - never had any intrusions, viruses or any other malware infection on any of them.
It was a bit techy & overwhelming at first (compared to simple firewall/AV software) but I learned a lot from using it & setting it up. I wouldn't use anything else now.
It doesn't have many (if any) rivals as a free security package with AV and a firewall.
First-class support with an official user forum too.
As for that Iobit Advanced System Care you're using, I would dump that ASAP.
It's essentially PC maintenance software but it doesn't do anything that you can't do yourself
using the tools built in to...