Hello, recently my computer has had some trouble with freezing up and it is constant. After playing DayZ my computer froze forcing me to hard restart. After this it was freezing before it even got to the desktop. Since then it has gotten better but still freezes sometimes not for hours or sometimes it will be after 10 minutes (mainly after I open a program and in particular games). When the computer does freeze the sound still plays and sometimes the screen will say no signal and go blank. Please Help!