You add an ActiveX control to a Microsoft Excel 2010 workbook.
You hide the columns that include the ActiveX control.
You save the workbook, and then you close it.
You reopen the workbook, and then you unhide the columns that include the ActiveX control.
In this scenario, the ActiveX control does not reappear in the unhidden columns as expected.
To resolve this issue, apply the following update:
2475876 Description of the Excel 2010 hotfix package (excel-x-none.msp): February 22, 2011
Note This hotfix package only prevents this issue from occurring in files that are created after the hotfix is applied. Therefore, any files that have this issue should be rebuilt after the hotfix is applied.
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, to have us enable the hotfix for you, go to the "Fix it for me" section. If you prefer to enable the hotfix yourself, go to the "Let me fix it myself" section.
Fix it for me
To enable the hotfix automatically, click the Fix it button or link. Then click Run in the File Download dialog box, and follow the steps in the Fix it wizard.
This wizard may be in English only. However, the automatic fix also works for other language versions of Windows.
If you are not on the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.