Windows trojan.
Hey guys. Recently I was attacked by some virus by installing an app from a random link. And that exe. File compromised my windows system. Luckily I changed my password and everything was good until about a week later just today when i turn on my laptop there were some PDFs saved on my screen. Saying my windows has been compromised all the passwords and with the guy who infected my windows. He demands for money he has sent a qr code. It also said he had access to my microphone, webcam meaning he stole my private life clips. He threatens me to pay him or else he's gonna leak all that.. he mentioned " do not try to reset the os" I'm worried sm rn. Idk what to do as I've never been through SMTH like this. Please if anyone can guide me about what should I do next to be free from this?