After installing Kaspersky anti-virus software, I was having trouble viewing my old messages in my inbox (when I clicked on an old message, nothing would appear in the box where the message usually appears). I attempted to fix this by right-clicking on "Inbox", selecting "Properties" and then clicking "Repair folder." However, this ended up deleting all of my old messages. I have checked my "Trash" folder and it's empty, so they're not there. Is there any way to retrieve the messages I lost?