Select the unwanted account in the left-hand Folder Pane. Right-click it, select "Settings".

The Account Settings pane will appear, with the chosen account highlighted. At the bottom of the pane is a button labelled Account Actions, which when clicked will reveal an option to Remove Account. You can select and remove as many accounts as you wish, but note that you won't be permitted to remove the default account. You'll first need to make one of them or create a default account.

I still am not sure about the answer to this question about whether the account will remain on Computer #2 if it is deleted on Computer #1.

I want to give my computer to a family member who will be using Thunderbird. I do not want to uninstall Thunderbird on the computer.

If I delete my e-mail account on the computer I am giving to the family member and add the family member's e-mail, will my account still remain on my other computer?

If I understand you correctly, you wish to add another email (family member) account to PC #1 and remove your personal account. Yes, you may do that and delete your own account. I assume this is a POP 3 account?

If you have your email set up on another computer, of course it will remain. Unless you are migrating from other accounts, all emails will be downloads for your account on PC #2. Unless you have your settings marked to save emails online for a period of time, then any emails you download are now on the PC and not available for downloading again. To repeat, a POP3 account downloads these mails, thus removing them from your server, unless you have set it via the server or Thunderbird to have emails remain online for a period of time. If this doesn't help you, feel free to email me @mdybluz@cox.net. Bob

I want to give my computer to a family member who will be using Thunderbird. I do not want to uninstall Thunderbird on the computer.

Deleting an account in Thunderbird does not actually delete the data on disc, so it can easily be recovered. I'd rather delete the entire Thunderbird profile in connection with the 'Delete files' option. Otherwise remembered passwords, address books, etc. would still exist in the profile. You can use the profile manager for this. http://kb.mozillazine.org/Profile_Manager#Deleting_a_profile

The same basically goes for your browser, assuming you don't want someone else see your entire browsing history, even if it is a family member.

There may be other data in your Windows account you want to delete prior to giving the computer away. Think about it.

Thank you.

So just to make sure I am understanding correctly, I can delete my account on Thunderbird on the computer I am giving to a family member but it will not affect my account on the computer I am using. All will remain in tact. That's all I am concerned about. :)

Thanks for the information about deleting the entire profile. It is for my 80-year-old aunt who only knows how to do things a certain way. LOL!! I don't think I need to worry about profile information being compromised. She won't know where to look.  :)

As long as my account will still be in tact on this computer that I am keeping, I am good.

THANKS SO MUCH to both of you.

I can delete my account on Thunderbird on the computer I am giving to a family member but it will not affect my account on the computer I am using.

That is correct.

Thank you, christ1.  :)