i am unskilled at PC's.
i got 1 virus, my ISP EMAIL spoofed and some one bought a PC under my name on my newegg.com account twice in a little over 1 year.
I think that your problem can be not with AV and system hardening, but maybe with your browser, browser extensions, browsing habits and local network.
What browser do you use?
Have you installed an ad-blocker?
Do you use something like safe DNS?
Do you visit web pages with cracks, pirated software, etc.?
Do you use your computer only in the home network or also in public networks.?
Do you share your home network with other people?
Do other people have access to your computer?
.
Furthermore, it would be better (and safer) for you, just using two separate Windows accounts. One for daily tasks (Standard User Account), and the second only for shopping.
You can also change Avast settings to apply Hardened Aggressive mode, for the better security. But then, do not bypass it when installing the new applications.
