I have small parallel vertical lines that have appeared on all my my icons. At the bottom of my desktop. One is attached to my mouse when I move it around. They are about an inch across and about an inch or so down. The ones on my mouse and icons are like a box shape. Its about 7 mini lines across then a space then repeat to 4 of these. Down its 8 but still 4 across. It makes up a mini box. My pics in iphoto are fine till I open them up. Then the whole image is lines. What is going on and how do I get rid of this? I cant edit anything to put on ebay. I have a 10.4.11.