I Have a system with Windows 10. I have another HD with Linux Mint on it. I go into the BIOS when I want to boot into Linux.

What do need I do if I want to dual boot, with two different HD's?

If I ever want to go back to just Windows on this machine, do I need to do something first that will make it easier if I ever need go with just Windows?

Thank you,

Chris.

Set the BIOS to boot the Linux disk, then run update-grub - that will give you Win10 and Mint on the grub menu.
If you ever need to revert to Win10 (only), just change the BIOS.

KISS.

It worked1 Thank you. It was easy. I like the terminal.

When I switched in the BIOS, when I switched back to windows, my date and time was always messed up. My screen settings like window boarders where way bigger.

Still does it, but at least I don't have to keep going into the BIOS.

From your understanding, If I take the Linux HD out, it will boot up Windows like normal?

Thank you for the help,
Chris.

Yes.

How do I make windows 10 the default? I assume there is a time before it boots without doing anything How would I adjust the time it takes before if boots?

Thanks for the help. Linux forums are the best!!!

Chris.

Those are all settings you can change in grub.
https://help.ubuntu.com/community/Gr...iguring_GRUB_2

You might be best using grub-configurator. You'll need to add the developers ppa for that. here is an article how to get it. You don't need to change the theme, but it will also allow you to change the timeout and default boot target.

As for the time, that sounds like you didn't set your timezone when you installed Mint. Windows uses local-time, while *nix defaults to UTC. Depending on your Mint desktop you can probably just right-click on the time and fix it there, or go through "settings". Set your timezone and dual booting should be fine.