Line Of Red Dots Only Appears On Dark Background

When I start my PC up a line of red dots appears across the monitor screen at the bottom of it. The line of dots again appears but higher up the screen when the windows screen appears. Both screens are dark in colour. Also if I have a block of dark colour anywhere with a light coloured background about 3 or 4 lines (each line directly above the other) of red dots appear across most of this block of a dark colour but none in the light coloured background. In all cases the red dots do not form a continuous line across the screen. My pc has an Intel i5 3570k processor running at 3.4GHz (not over clocked) with onboard intel HD4000 graphics. I do not have a separate graphics card.