It is because, for some organizations, especially big one, to support their company’ business, their facilitated their partners, customers, relations with the easiness technology can offer such as remote offices, mobile customers...

One of the first things that should be done to secure the modem is to change the default login name and password that comes with the wireless modem. With length and variety of characters and symbols in a password, the more secure the network becomes...

Information Security Administrator responsible for defining security frameworks for existing and new systems. He is responsible for system security planning, developing, and implementing security policies across multiple platforms; ensures successful implementation and maintenance of the defined standards; ensures compliance of IT Security Policies; provides support in security management and security architect standards and documentations; manages and supports networking and security services in LAN, WAN and Internet network infrastructure; manages security devices such as firewall, IDS, VPN; provides technical support and consultation for enhancement of and change to network security configuration; maintains documentation; defines processes to manage the network security; develops cutting-edge, innovative solutions for IT networks security; studies the proliferation of viruses; prevent hacker intrusion; conducts active penetration tests; discover vulnerabilities in information systems...

Or, the hacker can turn that PC into a spamming machine. Another malicious virus: The Bagle.j virus which spoofs and spams. It can impersonate your e-mail address and mass spam, sending out unauthorized e-mail on your behalf...