How to Delete past items in Notifications Area

Go to Run &type: regedit
Select Hkey_Current_User>>Software>>Microsoft>>Windows>>Current Version>>Explorer
And Finally choose Tray Notify
Now you'll be able to see Some Items In right-hand side.
Carefully Delete 1}Ballon-Trip 2}Icon Streams 3} Past icons stream & exit.
Now Go to Taskbar to open Task-Manager
Select Processes Tab and carefully delete Explorer.exe & Finally Go to File[In the Task manager itself]and Type: explorer & exit

Or Simply Use CCleaner and run the application  and restart explorer.exe