Old Notifications

To clear old Notifictions old try icons left in Notifictions

Remove the following key from your registry

Start - Run - Regedit

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\TrayNo
tify] "PastIconsStream"

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\TrayNo
tify] "IconStreams"

After which you have to kill the explorer process and restart it.
Take note that shutdown and restart won't do, u have to kill explorer.