i think the point of the whole text is that when users download unauthorized and/or illegal programs, they could get viruses which often leads to security leaks within the enterprise.
Sometimes employees who visit suspicious webpages can impact the security of the entire company due to the viruses and Trojan horse injections.
This subject also caused a discussion about the fact that users should use more virus protection programs to protect themselves and the enterprise
such as downloading , buying or creating a good program for scanning viruses so that they can check their computer before work