Tight click the icon in the tray and select the option written in bold (I use the Dutch version, it should be something like Protection Control Center maybe?) anyways, it's the only bold thing. Then press the button "More >>" or "More Detail..." in the new window; You will see the inactive providers in gray and the active ones in color, select the inactive ones and press "Start" or "Begin" or "Run" on the right side, the selected provider should start