Win7 machine: Install Thunderbird and run for the first time to create a Profile but do not create any mail accounts. Make hidden folder and files visible. * http://kb.mozillazine.org/Show_hidden_files_and_folders At this point I would suggest that you enable all the toolbars as most help refers to them and not all tools are accessible via the 3bar menu icon. Note you do not have to do this as it is up to you, but it is more convenient. see image below. * 3bar menu icon > Options select: * Menu Bar * Mail Toolbar * Status Bar * Quick filter bar Now access Profile folder: * Help > Troubleshooting Information * clickon 'show folder' button a new window opens showing your new Profile Folder contents. * Close Thunderbird now - this is important. The new Profile folder name will be called something like this: xxxxxxxx.default, where the x's are letters and numbers. it will look similar to the second image below. * Delete the contents of the new profile name folder that you just created, so that you have an empty xxxxxxxx.default folder. * Locate your Linux Mint backup of your Profile folder. Copy.paste the contents of the old profile folder (all its files and subfolders - not the actual Profile name folder) into the new, empty profile name folder. * Restart Thunderbird. If all looks ok then you are up and running. More info here: * http://kb.mozillazine.org/Moving_your_profile_folder_-_Thunderbird