Note This issue occurs after you apply update 2405840 or a later version of the Excel 2010 hotfix package that fixes the issues that are described in update 2405840.
Registry key informationImportant 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:
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For Windows 8
For Windows 7, Windows Vista, Windows XP, Windows Server 2008 or Windows Server 2003
Article ID: 2760378 - Last Review: Mar 15, 2013 - Revision: 1