Article ID: 922848 - View products that this article applies to.
When you try to open a file that was saved in a Microsoft Excel format, the file does not open. Additionally, you receive the following error message:
If you receive a similar error message when you try to save a file, see the following Microsoft Knowledge Base article:
You are attempting to open a file type that is blocked by your registry policy setting.
You are attempting to open a file type <<File Type>> that has been blocked by your File Block settings in the Trust Center.
(http://support.microsoft.com/kb/945797/ )You receive an error message when you try to save a file type that was blocked by your registry policy settings in Excel 2007 or in Excel 2003
This issue may occur if an administrator has restricted the types of files that you can open in Microsoft Office Excel 2010, Microsoft Office Excel 2007 or Microsoft Office Excel 2003. To do this, an administrator can set a registry key to restrict this functionality.
By default, the following file types are blocked in Excel 2010:
For Excel 2007, the registry key can be set in the 2007 Office System Administrative Templates. For more information, see "Excel 2007" subsection of the "More Information" section.
For Excel 2003, update 933666 enables an administrator to block the ability to save or to open files in Excel 2003. For more information, see the "Excel 2003" subsection of the "More Information" section.
By default, the following files are blocked in Microsoft Office 2003 Service Pack 3:
938810 Information about certain file formats that are blocked after you install Office 2003 Service Pack 3
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in WindowsTo open files that are blocked by the registry, you can disable the restriction on opening presentations that were blocked by the registry settings of Excel. To do this, click to expand the section according to which version of Excel you are using. Click here to view or hide detailed information Click here to view or hide detailed information Click here to view or hide detailed information
Note You can also contact the system administrator to change the Group Policy setting.
How to restrict files in Microsoft Excel
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Excel 2007Click here to view or hide detailed information
Excel 2003Click here to view or hide detailed information