XP User Accounts Setup

Question

I set up a second user account on our home PC this evening, and upon the next restart the computer went into scan disk before fully booting up and considered the new account the default. Once I investigated further it looks like the system deleted our existing account, all excel, word files and both our e-mail editors (Outlook & outlook express respectively) It won't even let us get into these editors. The question now is can I get our files back or are they lost for good?