The Camera tool performs slowly in Microsoft Office Excel 2007 when you use a zoom setting other than 100 percent in a workbook. Additionally, Office Excel 2007 runs slowly when you open the workbook or move a shape in the workbook.
To resolve this issue, apply the following update:
2596538 Description of the Office Excel 2007 hotfix package (Excel-x-none.msp, Graph-x-none.msp, Xlconv-x-none.msp, Xlview-x-none.msp): October 25, 2011
Registry key information
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 Windows
After you install the hotfix package, follow these steps to enable the hotfix: