What is the difference between internal hardware and software

Computer hardware is any physical device used in or with your machine, whereas software is a collection of code installed onto your computer's hard drive. For example, the computer monitor you are using to read this text and the mouse you are using to navigate this web page are computer hardware.

Internal hardware is physical parts that help the computer work; software is the programs and applications that make the computer work.

he is suggesting that this widow is a strong woman, who is giving constructive criticism and she has enough to worry about, and she takes care of him, so he does not take it to heart.