hi a having a serious problem ..whenver i m trying to play one of my high resolution vider the monitor getting black screned 4 few seconds and then when it appers the pixels of my pc is automatically gettin changed...andthere is a graphical error coming..its showing an option tht ialmrnt5 display drivers is stopp working normally...thn i have to rebbot it to restore previous resolution...how do i get rid of these...pls suggest me