How to delete the Windows 7 notification area invalid icon

  
part of the program will automatically display an icon in the taskbar notification area at runtime, indicating that it is executing, in the Windows
7 system, although you can customize whether to display these program icons However, whether it is a program that is currently in use or a program that has already been uninstalled, it will be recorded and always exist as long as it appears in the notification area. To completely remove these invalid program icons: Run "regedit" to open the registry manager. Expand to "HKEY_CURRENT_USER\\Software\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\TrayNotify” Delete the following key values ​​for “IconStreams” and “PastIconsStream”. Then restart your computer
the failure icon in the notification area will disappear.
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