You may receive a "Data Error (Cyclic Redundancy Check)" error message in Outlook

Applies to: Microsoft Office Outlook 2003Microsoft Office Outlook 2007Microsoft Outlook 2010


After Microsoft Outlook downloads e-mail to your computer, you may receive one of the following error messages:
File path\filename.pst could not be accessed. Data error. Cyclic redundancy check.
In this error message, path\filename.pst correspond to the location and the file name of your Personal Folders (.pst) file--for example, C:\mypst.pst.
Data error (cyclic redundancy check)
You may not be able to view some of the downloaded messages. When you click your Deleted Items folder, you may receive the following error message:
Error 0x80040116


This issue may occur if your personal folder file (.pst) is corrupted.


To resolve this issue, first check your hard disk for errors, and then re-create your personal folder file. To do so, follow these steps.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Check your hard disk for errors

Use the Windows Check Disk utility to check your hard drive for errors.
  1. Open a command prompt.
    • For Windows Vista and for Windows 7, click Start, type cmd in the Start Search box, and then press ENTER.
      Note If you are prompted for an administrator password or for confirmation, type the password, or click Allow.
    • For Windows XP, click Start, click Run, type cmd, and then click OK.

  2. At the command prompt, type chkdsk /f, and then press ENTER.

    Note If you receive a message similar to the following
    The type of the file system is NTFS. Cannot lock current drive.

    Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? (Y/N)
    press Y, press ENTER, and then restart your computer.
  3. When Chkdsk finishes, close the command prompt.
  4. Start Outlook, and then if the problem still persists, proceed to the "Repair your personal folder file" section.

Repair your personal folder file

Use the Inbox Repair Tool to repair your personal folder file. For additional information about the Inbox Repair Tool, click the following article number to view the article in the Microsoft Knowledge Base:

272227 How to use Inbox Repair tool to repair pst file in Outlook

More Information

If you don't use Microsoft Exchange Server, Outlook stores your e-mail messages, calendar, and other items in a Personal Folders file.