Moderator's note:
This website periodically gets posts from new members who're seeking solutions to damaged pst, dbx or similar files. They seem to be invariably followed by posts from other new members, recommending specific software. (i.e. they're poorly disguised spam). I must have seen around a hundred such spamming attempts (and not one single genuine question about such issues). So this thread is regarded as 'highly suspect'. If a 'helpful' link from a new member turns up here I'll simply delete this thread.
However, if it's actually the first genuine question on this topic, I hope that Chelle7272's link will help. (I'm just hoping that the link at the foot of that page isn't the one which was going to be spammed anyway!)