how to install itunes onto non-internet pc windows 10

I think it's almost impossible to add iTunes to a non-internet computer. Even if you did, there are many occasions when iTunes needs access to the internet in order to do what you want it to do.

By the way, this is not a chat room. It can take a while before you get any response to your posts, possibly from someone who is on the other side of the word to you and in bed when you post.