This article describes how to clear the Past Items list in the Customize Notifications window.

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:
To clear the Past Items list, perform the following steps:

1.	Delete the IconStreams and PastIconsStream values from the following registry key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\TrayNotify
2.	Open Task Manager, click the Processes tab, click Explorer.exe, and then click End Process.
3.	In Task Manager, click File, click New Task, type explorer, and then click OK.