Security Shield just installed itself. I didn't do anything yet except try the ctl-alt-delete, which disappeared. I see a new icon on my taskbar for security shield and the red shield from windows that indicates my computer is not protected. I would really appreciate help so I know what to do next. I'm running windows xp pro. Please tell me I can I go into safe mode and do a system restore and it will be all better. THANKS so much! Linda