In the case of the "path not found" issue, I would suspect that the application was unable to find the source of your backup files in the location specified by that application. It is possible it was moved, removed, deleted or renamed. Windows backups are stored using a .bkf extension, so I would check your partition to see if it still exists. If it does, you may try using the Windows Backup and Restore Wizard to reclaim your files.
This was first published in March 2005