3. Delete Icon Streams and PasteIconStreams from the list
4. Exit the registry editor, restart your computer and the items in the notification area should now be gone.
Modifying REGISTRY settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the configuring of REGISTRY settings can be solved. Modifications of
these settings are at your own risk.
Remove icons from the notification area (system tray)