It's not virtual, and it's not real. This software is two at once.

Dávid - a man living alone - one day receives an email. The email is about an unknown but also special software that is offered only for him, for free. Dávid's friend Oszkár tells him that the software is capable of rewriting reality, but also warns him to ignore the email, because it can be dangerous. Dávid doesn't listen to Oszkár, and downloads the software.