The main features of infection include an increase in outgoing Internet traffic - usually just for individual users and corporate networks. If this is not being actively online activities (eg at night), it means that it is someone else. And most of all - a malicious purpose. If there is a firewall signal of infection may be unknown applications attempt to open an Internet connection. Numerous advertising "pop-ups" when visiting Web sites may indicate that the system has a system of advertising (Adware).
