I installed Thunderbird on my laptop. No problem whatsoever. Then I tried to install it on my sister's new laptop. It gives a message that it can't contact the server. I decided to uninstall Thunderbird and start again, from scratch. But when I uninstalled it an re-installed it, it automatically populated with the account that won't work. So I tried uninstalling the whole program again, rebooting, and re-installing, and it did it again. Then I decided to create another email account (for the same email address). Despite trying to name it differently than the first, broken one, it ended up looking identical. It still said it couldn't communicate with the server (whether that was account 1 or account 2 I'm not sure). But for fun, I tried to send out a test email. It asked for the password, which I re-entered, and despite looking non-functional, it actually sent the email. But it hung trying to move it to the "Sent" folder. At that point I gave up for the day. So my question is: why is Thunderbird remembering the account information, even when I uninstall the program? My other question was how to delete both existing email accounts that are there now. I think I may have found that answer in your forums. I could NOT find any way to do that just looking where I thought it should be. Thanks.