Final answer:
Utility software provides additional functionality to an operating system, such as anti-virus software. It helps in managing, maintaining, and controlling computer resources and ensuring system security and efficiency.
Step-by-step explanation:
The type of software that provides additional functionality to your operating system, including anti-virus software, is typically referred to as utility software or system software. These tools are designed to help manage, maintain, and control computer resources. Anti-virus software is a common example of utility software that adds a layer of security to an operating system, such as Microsoft Windows, by protecting against malware and viruses.
Other types of utility software can include computer system management software, file management tools, and backup software. It is essential to keep your utility software updated to ensure that your system runs smoothly and securely. Common office suite software like Microsoft Office, email software, and database software like Microsoft Access provide productivity functionality but are not classified as utility software.