How to remove popup from windows?

We all aware of the fact that computer virus scams can arise in various formats, sometimes they are annoying and sometimes they went away by choosing big X from the top-right corner of the window. Nowadays, users are receiving fake virus warning that says your system is infected, your machine has the critical error, blue screen of death error or many more. No doubt, windows virus alert can arise in different forms but they are only scare tactics so that user can contact the scammer for assistance. Please note one thing in your mind that no matter what they say, or they belong from where, their ultimate intention is to steal money from the innocent users and all this is fake tech support scam.