Hello! Some days ago everything was OK with my computer, but at next day when I opened my computer I saw that suddenly there was a twinkling at the bottom of screen (from side to side). In next days it have become cumbersome and my eyes hurt because of that. Picture itself is usual, but suddenly will come "flash"(sideways) for a moment and it happens really often.Sometimes full screen flashes, then only half and so on. Would also add, that when I turn my picture horizontal then "flashes" will appear horizontally too. Have no idea what might be the problem, maybe procesor? Or is it some kind of software reason?