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I don't have any antivirus or firewall.
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Seriously? No anti-virus? No firewall?
I'd call that reckless and ill-advised.
No firewall, yes shouldn't go that way it prevents malicous thingies sometimes. Virusscanners however tend to be shit, resource consuming and not picking up new stuff.
I have windows defender and regular firewall (w10) and I never have any problems, (I do know what I am doing though and keep my system up to date)