I lost my windows 7 and am installing windows 10 on a new computer and moving from Outlook to Thunderbird I have installed Thunderbird. Outlook won't start but I found the PST file. I used SysInfo PST Converter to convert my PST file to MBOX format. But Thunderbird won't accept it; says I should check the error console. After I finally found the error console I did not understand one word it said. My impression is that Thunderbird import looks for a file or a folder. SysInfo Converter gave me a "Outlook 0" folder which had and an empty MBX file and a sub folder called Top of Personal Folders which contained a Contacts, Deleted Items, Inbox, and Sent Items folders, and each of those has sub folders and/or MBX files. All of these were in a folder that I chose and named Thunderbird. Anybody know how I can import my converted PST file into Thunderbird? Thanks a ton. RodB