Assume that you install the new Microsoft Office on a computer that has Office 2010 installed. When you double-click an .xslx file on the computer, Excel 2010 starts but the workbook does not open.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2687476 - Last Review: Sep 1, 2012 - Revision: 1
Microsoft Excel 2010