Looks fine here. This is almost certainly a graphics card driver issue. We have had this issue reported several times before and every time it was fixed by updating the graphics card driver. What graphics card do you have? The About screen should tell you.
And for the drivers, have you tried to go to the webpage of your manufacturer and get the drivers from there ? As explained in Ashley's article, some facturers force you to go through them for the drivers of laptops, and only those will work.