My dad plays a game of Pac-man that I downloaded for him, and he is a competitive player. He recently told me that the keys he uses(arrow keys) were unresponsive. I checked them by playing the game. The keys work, and I don't notice a difference or lag. This is probably because he is a very good player, much better than I am. He does hit the keys rather hard, and we have been using this keyboard for close to two years. I just got ride of a bunch of viruses and trojans. I don't know if the keyboard is just going out or what. Any help would help Thanks a bunch.