Moving to a new computer

Moving Thunderbird on windows is as simple as downloading mozbackup and using it to move your mails it offers a full backup and restore service.

If you are not simply moving from one version of windows to another but are changing operating systems then you will need to do the job the old fashioned way using the mozillazine instructions.

If you don't like using the third party Mozbackup you can always use the instructions in Mozillazine