Final answer:
When an on-screen message appears for permission to begin a software update, the customer should confirm the update and follow the prompts.
Step-by-step explanation:
When an on-screen message appears for permission to begin a software update, the customer should confirm the update and follow the prompts. By confirming the update, the customer allows the software to install any necessary updates and improvements. Following the prompts ensures that the process is completed correctly and any potential issues are addressed.