Then i did virus scan on windows scan and it found lot of threats. Then how in the world do you protect yourself when googling things then? I mean are you suppose to inspect every single site you want to visit? So imagine you looking for cooking recipes and found a bunch of sites... you have to make sure its a cooking recipe site?
I don't understand why you've made it such a big deal. A computer that does not have a firewall protection is more vulnerable to be compromised. Just turn on your anti-virus, it will detect malicious sites and files. It's not recommended to keep bitcoins in such computer that connects to the internet either way.
You said you have a hardware wallet? What stops you from using it?
I am pretty sure my windows defender had firewall protection on. My windows defender and malwarebyte was on the entire time when I clicked on the link. Again, the windows scan detected tons of threats when I did a scan right after I clicked on the link. My concern here is I stored seed in the password manager in the computer. So if it could read my seeds from my password manager, that is not good.
I have a hardware wallet. But some of my coins are not compatible with the hardware wallet. So I have those software wallets on the computer. There isn't an option for some of the coins I have because you can only use software wallets for it. But the issue is i wrote the seed down in the password manager.