SysTools OST Viewer has to answer to all these questions. Open OST file to PST process, you can use some commercial software application. One third-party software tool is Open OST to PST. How to Open OST file software aims at performing perfect conversion? Without touching unique content of the data, notes, emails, calendars, journal, notes etc. This software tool is designed specifically to recover data from the corrupted OST files and save the same in OST file format. View OST File free downloading is available at SysTools. After you satisfied you can invest in full licensed version of the software. The tool support about all Outlook version including 2000, 98, 2003, Vista and Win7, so you can easily SysTools OST Viewer. You can online purchase of this software for full licensed version only at $99. For more info-: http://www.outlookpstviewer.com/viewost.html