When I do CONTROL ALT DEL for Windows Task Manager,

The Green System Tray Icon showing CPU Usage does not always appear. I've
tried and read all kinds of suggested fixes, and none of them work for any
length of time and deleted the registry entries for icons. Using Scannow
only temporarily fixes it too. Did MS ever come out with a fix? Can't seem
to find anything recent about it in the knowledge base, etc.