Question

to protect a computer, it is a good idea to install and frequently run a checklist. a web browser. an internet cache. anti - virus software.

Explanation:

Anti - virus software is specifically designed to detect, prevent, and remove malicious software (viruses, malware, etc.) that can harm a computer. A checklist is just a list of items to check, a web browser is for accessing the web, and an Internet cache stores web page data. None of these are for protecting a computer from malicious software like anti - virus software.

Answer:

anti - virus software.