You should always know what you install on your own computer.
Avast is an
antivirus software, which is good to have, but you should only have 1 of those.
Windows comes with windows firewall built in, and you should only have 1 of those.
Windows defender should be
disabled, because it runs in the event that you do not have an
antivirus software, but you do have one. You have
avast, so disable
defender.
Defender isn't very good,
avast is much better.
I do not personally know of any security detecting programs. If you would like, you can take a screenshot of all of your installed programs, and I can tell you what security programs you have installed. Here is how to do that and to upload the picture here, if that is something you want to do:
Screenshots and Files - Upload and Post in Seven Forums - use the "Snipping Tool" feature as said in the tutorial instead of MS paint (click it to find out how).
credits: Tutorial created by Brink