I truly hope this is a joke.
I don't think it is.
Every single person told you to not store your mnemonic code / seed of the hardware wallet on your PC.. and you still did that?
I think his seed was already saved in a password manager before he started asking if that is ok to do. He was probably looking for confirmation from someone that it's a good way to protect the seed. But even after multiple people told him it isn't, he felt there was no reason to change anything.
However.. how could you possibly store your mnemonic code on your daily computer? Didn't you listen to everyone talking to you?
If you give Jerry advice, he asks other people if the advice you gave is good. If he gets confirmation that it is, he will tell you that he has decided not to do it the way you told him to.
He has a Nano S? He should just import the paper seed into a fresh Electrum wallet or even BlueWallet on his mobile if he only has that one infected machine; then send all funds to the Ledger & that's it. Coins secured.
Yeah, he has a hardware wallet, but he doesn't always have access to it. Or more precisely to its seed. He has been asking questions about passphrases and how to set one up on Ledger for over 2 years. He never did of course. He can surely send his coins to his Nano S even if he uses a potentially vulnerable computer. But his paranoia levels are extremely high and I don't think he wants to connect it to that potentially infected PC.
@Jerry
What is the problem with the other computer you mentioned that you have? You said it doesn't have Windows. Ledger Live is available for Linux and MAC as well. I am not sure about the other software you are trying to save but you should check it out.