Open regedit and go to *HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify* and delete the *Applets* sub-key and the Shell Extensions sub-key.
NOTE. Please back up the *notify* key by exporting it to a safe location. Call it notify.reg.
Did you create that reg file I just merged?
Yes. Why? Did it work :)?