Windows7 operating system cleanup notification area icon

with win7 for a long time, there will be a lot of software records that have been uninstalled in the notification area, these useless stuff is really disgusting, must be cleaned up, what should I do? Please see the following methods:

Clean up one:
1, press “Win+R” key combination, enter “regedit” open the registry editor, and then open the following key values:
HKEY_CLASSES_ROOTLocal SettingsSoftwareMicrosoftWindowsCurrentVersionTrayNotify
On the right you can see two key values: IconStreams and PastIconsStream, which delete their values.
2, then call up the task manager to terminate the process "explorer.exe", then click on the "File & mdash; & mdash; New Task" in the Task Manager,
enter "ldlor;" The car, in order to restart the system process. (or restart your computer).
3, now look at the icon in the notification area, the expired icon has been successfully cleaned up.