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You may notice that all of the programs that are installed on your computer may not be displayed in the Add/Remove Programs tool.
This behavior occurs if a program's DisplayName or uninstall key name is longer than 63 characters.
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 issue:
Click Start, click Run, type regedit, and then click OK.