You will need to install the OneCare Restore tool if you need to access the backup to extract any files from within. You will also need to find an alternative backup solution. If you are using Vista or Windows 7, you can use Windows Backup. I don't recommend Windows backup in XP.
Restore Tool here: http://social.microsoft.com/Forums/en-US/onecarebackupandrestore/thread/e5d686c8-762b-4b22-bc08-bfb93f911e57
-steve
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