Windows 10 was updating last night and I may have tabbed the power icon to turn it off but can't recall nevertheless this morning I moved my mouse and the update was just finishing. Then suddenly I noticed a shield with blue and yellow colors with a flashing orange background in my task bar and now nothing works on the task bar. I did go through task manager to see if anything was obvious but did not see anything (I am higher than a novice but much lower than an expert). I ran a quick scan with my Panda and found nothing and am running a deep scan. I also used a microsoft trouble shooter but it found nothing. Any help would be greatly appreciated.