Final answer:
The vulnerability created by not installing antivirus software falls under the Workstation Domain of an IT infrastructure.
Step-by-step explanation:
The vulnerability created by forgoing antivirus software for the first year of a new company's business falls under the Workstation Domain of a typical IT infrastructure.
By not installing antivirus software on the company's computers, the owners increase the risk of malware or viruses infecting the workstations. Without antivirus protection, sensitive data can be compromised, leading to potential data breaches or system failures.
It is important for companies to prioritize cybersecurity measures, even if they have limited resources, to safeguard their networks and data.