mrquickly said:
Unbelivable If found the key.

This one disables the icon:

Code:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
 "HideSCAHealth"=dword:00000001
This one enables the icon:

Code:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
  "HideSCAHealth"=dword:00000001
Thanks all for your support
The keys you have mentioned is for the current user. and will not have any effect on other users
I believe you have dc?. Through dc you can disable action cente vis group policy for all users

Delphin.