If you have a laptop that crashed and you are unable to access the OST file, it has most likely become disconnected from the original Outlook profile or orphaned. In this situation, you are unable to access it within Outlook. The best way to move forward would be to use a reliable program such as FixVare OST to HTML Converter. This program will allow you to convert all mailbox data, including emails & attachments. After you have converted your OST data to HTML, you can open your emails in any web browser without Outlook. The data will maintain its folder hierarchy as well as data integrity after the conversion. This OST to HTML Converter works with all OST versions and has a simple and user-friendly interface, making it easy to use without any hassles.