In Microsoft Office Excel 2007, you apply conditional formatting to cells. When you copy and then paste the cells, the conditional formatting rules are duplicated even though the rules already exist in the cells.
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
To resolve this problem, follow these steps:
Apply the following hotfix:
973932 Description of the Excel 2007 hotfix package (Excel-x-none.msp, Xlconv-x-none.msp): August 25, 2009
registry entry. To do this, follow these steps:
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry subkey: