I got a problem adding new POP3 email accounts to global folder standard profile account on Windows 10 . (I just migrated to Win 10 PRO , 64 Bit after using Thunderbird for years without problems on Windows 7 PRO , 64 Bit and earlier Windows) Thunderbird version is 45.2.0 and doesn't say if it is 32 bit or 64 Bit in the about window This is what I do to add the account (I do it this long way to make sure that I start working from "local folders" ) : I select the "local folder" out on the left in GUI in Thunderbird , then on right side in "Thunderbird Mail - Local Folders" section "Create a new account" I choose "Email", then I choose "Skip this and use my existing email" , then in pop-up windows "Mail Account Setup" I fill in name , email and password (and continue) , then in new Window Thunderbird has automatically found correct configuration so I choose POP3 and then "Manual Config" , Then Window changes to show POP3 configuration , I leave these configurations as is because only thing I care about is to get to "Advanced config" which I then chooses..... AND here problem appears , after I have chosen the "Advanced Config" with the sole purpose getting to the account advanced config to expecting to get to the "Advanced account settings" of server settings of account settings then Thunderbird suddenly creates the account OUTSIDE the local folders global inbox where I wanted the account to be INSIDE the global inbox , I then still do the now futile changing the advanced server settings to "inbox for different account" and there choose "local folders" , I then get a warning saying : "If you store this account's new mail in a different account's Inbox, you will no longer be able to access already downloaded e-mail for this account. If you have mail in this account, please copy it to another account first." , to which I respond OK , Then because Thunderbird already placed the account outside local folders I get a new warning the "Junk settings on account have a problem" so I have to say yes and then re-direct junk to local folder junk. Anyway , I have tried this multiple times , also through "Tools" , "Account Settings" , "Account Actions" , "Add Mail account" , with same result , The new POP3 account still makes it's own icon and folders outside "Local Folders" which apparently cannot be removed other than by removing whole account again ! Am I doing anything wrong ? , or is this a bug with Thunderbird on Windows 10 that I have to report ?