Question

Security of computer system threats and prevention

Answer 1

Unintentional threats are considered to be human error, environmental hazards, and computer failures. Most people don't purposely cause harm. Intentional threats refer to purposeful actions resulting in the theft or damage of computer resources, equipment, and data.
Bill would be considered a cracker. A cracker is a term used to describe someone who intentionally breaches security to break into someone else's computer or network for a malicious purpose. 
Bill has a great deal of knowledge concerning computers and computer networks. He works for a large technology company and has become disillusioned with the organization. He dislikes what they stand for and the way they conduct business.