@submix8c: Maybe it's down to user error. I only told you what happened. @jaclaz: Thanks for the advice. I found the folders using the instructions you provided. Now I have a mystery to solve. I have 3 "Inbox.dbx" files in the Outlook Express folder. Inbox.dbx. The missing Inbox.dbx IS listed. ALL my missing emails ARE there using the Mailview tool you suggested (but NOT listed in the Inbox, when I open the Outlook Express program). Inbox (1).dbx. Mailview says: "file does not contain any messages". Inbox (2).dbx. This contains the only emails I can see in my inbox when i use the Outlook Express program. Starting from February 2014. So, it looks like NOTHING is lost, but somehow ALL my emails from January 2014 and earlier, contained in Inbox.dbx were removed from the OE program and it just lists the emails from Inbox (2).dbx. N.B. The "new" Inbox works fine, but is obviously missing all my older emails. I also just discovered the same thing happened in my Sent folder. I have two Sent.dbx folders. Sent.dbx. This file contains ALL my older emails that are missing from the OE program. Sent (1).dbx. This contains the only emails I can see in my inbox when i use the Outlook Express program. Starting from February 2014. So it's the same pattern. How do I get the older Inbox and Sent emails back to the OE program? I'd also love to know what might have caused this in the first place. I have lots of other emails/folders/addresses in Outlook Express that were NOT affected. Only my main Inbox and Sent files. This is really weird. Please help some more if you can. Thank you!