Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Anyone else find @Microsoft 'anniversary windows 10 update 1607' a Complete #nightmare
This tweet contains emotions: 
anger, fear