Illustrator displays an error about a corrupt Preferences file

On launching Adobe Illustrator, an error displays information about a corrupt Preferences file. The error may recur on successive launches of Illustrator, or may sometimes happen randomly.

Workaround

Note:

You may need Administrator permissions on your computer to complete the following procedure.

  1. On your Windows-based computer, choose Windows > Run.

    Note:

    Alternatively, press Windows key + R.

  2. In the Run dialog, type intl.cpl and press Enter.

  3. In the Region and Language dialog, in the Administrative tab, click Change system locale.

  4. In the Current system locale drop-down, select English (United States), and press OK twice.

  5. Start Illustrator. In most cases, the steps performed so far should fix the issue with the Preferences file in Adobe Illustrator. Proceed with the next step if you continue to experience an error with corruption of the Preference file.

  6. Repeat Steps 1 and 2. In the Region and Language dialog box, click Additional settings on the Formats tab.

  7. In the Customize Format dialog, ensure that the:

    • Decimal symbol field is set to the decimal point (otherwise referred to as the period symbol). Press OK twice.
    • Digital grouping symbol field is set to comma.
  8. Restart Illustrator.

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