UKR said: If your computer really used to run Quicken 2003, it is not enough to have just the QUICKEN LAPTOP.QDF file. In 2003, a "Quicken data file" consisted of several separate files of different file extensions, QDF, QEL, QSD and QPH, all named QUICKEN LAPTOP.*See https://www.quicken.com/support/quicken-data-file-set-extensions If you have a backup copy of your data files, all created by the Quicken Backup process, you have a single combined (possibly zip-like) file containing all the pieces, but with a different file type (I forget which type exactly) on the backup media. The Quicken Restore process would be able to recreate the individual files.If you only have a copy of the QDF file, but neglected to also save the other files, you are in trouble.