iTunes login

Check here -> see this Apple article: If your computer doesn't recognize your iPhone, iPad, or iPod

If your computer doesn't recognize your iPhone, iPad, or iPod - Apple Support

I don’t know if it’s because it’s an old email or Id name

What do you mean?

You are sign in here .  .  .  with your Apple ID & Password.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

I finally got into my iTunes and have been trying to get it moved from c drive to d.

If you have iTunes installed on your PC, don't en never move it to another internal drive, if you do that, it's a mess.

Make sure your Windows PC is up to date & has the latest version of iTunes.

See also -> Check your third-party security software.

Check the Wi-Fi connection.

Turn Off Hotspot.

Turn Off or remove VPN if necessary.

Disable all AV & Firewalls temporarily.