Taskbar I con

I updated my windows yesterday and now my comodo shield will not show up on my task bar. The bubble still pops up saying its updating and its running in the background but the shield does not show up by my clock as running. I checked to make sure that the Icon was not hidden or anything. I am not sure what happened but I must say I am a little bit worried about it since half my windows update keeps failing as well. And with all this fuss about worms in stuff im a little paranoid any advice???