Final answer:
Jacob exposes his computer to a security vulnerability by using a file-sharing service, risking both personal and work-related data and engaging in illegal downloading of copyrighted material.
Step-by-step explanation:
Jacob's use of a service where he shares his computer's content with other users, from his work computer, to obtain movies at no cost is an example of a security vulnerability. This practice exposes both his personal and potentially sensitive work-related data to risks such as hacking, malware, and breaches of confidential information. Services that involve sharing files can be exploited by hackers to gain unauthorized access to systems or data. Additionally, the act of downloading and sharing copyrighted content without authorization is illegal and can impact the economic rights of content creators, as highlighted by the Supreme Court ruling in MGM Studios v. Grokster (2005).