Follow these methods.1> Open MS paint.(Go to accessories-> open paint)2> Now click on Image tab-> Go to Attributes.3> Select the value of width and hight at "2" and "2" that means create an image of 2 pixel by 2 pixel.4>Then click on the view tab-> Zoom.Select custom zoom set it at 800%5> Now u can see a small square white box. Fill up the box according tofollowing ways.a> Put black in the lower-left corner,b> dark gray in the lower-right corner,c> and light Grey in the upper-left.(See this attached thumbnails below for how to arrange it)6> Save it some place.7> Right click on the desktop. Go to properties.8> Go to Desktop option.9> Click on Browse.10> Set this bitmap image as a background wallpaper.Or, u may click on this bitmap image right click on it and set this as a desktop wallpaper.11> Set position to Stretch.12> U have done it.