I may be mistaken but I don't recognise a firewall in your list.

"I have the basic Windows firewall"

As do I.

I work long hours with computers, and have done so for a very long time. All of my machines are connected to the internet. All of them run the free version of AVG anti-virus software, and nothing else. I use Ccleaner to clean up redundant registry entries and other stuff from time to time,and that's it.

I cannot remember when any of my machines last had a computer virus of any kind. They all run smoothly, and are as well protected as I need them to be.

There is an enormous amount of rubbish talked about the need for all kinds of computer security software, and it panics people into thinking that it's necessary to install multiple levels of protection - it isn't.

Run a decent anti-virus application of your choice, use the Windows firewall, and use your commonsense when surfing the internet - don't disclose personal information unless you're reasonably happy that it will be respected in terms of your privacy. Don't open email attachments unless you know and trust the source, especially odd ones that unexpectedly come from people you know. Stay clear of the 'dark side' of the internet (I'm sure you don't need me to spell out what I mean), and only install software from trusted sources.

Do all that and you should be fine.