I just bought an R5-571T from Best Buy. It's a two in one, but there is a doulbe ine that goes across the top of the screen. My initial though was that it served a purpose and there was some setting that was causing it, but I haven't been able to find anything. I took a screen shot, but the lines do not show up in the screen shot. If you're using the Chrome browswer the location would be right through the middle of the tabs going accross the whole screen or about 3mm down from the top and the lines are about 1mm apart.