Drop-down lists and certain form controls appear fuzzy when the zoom setting is not 100 percent in Microsoft Excel 2010.
To resolve this issue, apply the following update:
2596500 Description of the Office 2010 hotfix package (Oart-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
To have us enable the hotfix for you after you install the hotfix package, go to the "Here's an easy fix" section. If you prefer to enable the hotfix yourself, go to the "Let me fix it myself" section.
Here's an easy fix
To enable the hotfix automatically, click the Download button. In the File Download dialog box, click Run or Open, and then follow the steps in the easy fix wizard.
This wizard may be in English only. However, the automatic fix also works for other language versions of Windows.
If you’re not on the computer that has the problem, save the easy fix solution to a flash drive or a CD, and then run it on the computer that has the problem.
Enable the hotfix
Let me fix it myself
Easy fix 50788
Follow these steps to enable the hotfix:
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate and then select the following registry subkey: