Even if you have antivirus system and firewall you still are not safe. Trojans could be recording all your valuable passwords, credit cards, etc. without you knowing it. A Trojan is a mini program running on a workstation (PC or Macintosh). At its basic level, it merely records every key pressed together with the username and password when you access any computer network. Thus, it may give hackers chances of entering your computer and damaging the system.
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