hello everyone, i posted this problem before and i was advised to update my graphics driver which i did but no good luck appeared. anyway, my last post problem was not clear so i am doing it again with a clear images these pictures describes my problem, on my iMac and running xp under boot camp i frequently get this grading issue and this also this this happens like 2 times a week and wont go unless i restart my computer these pictures are taken by my iPhone if i do screenshot from the xp, the pictures are very clear and no grading issues when viewed by you, or even when i see them when i restart. under mac, there no graphics problems at all. i dont want to do a format, because i dont want install every piece of software again, and i have Tiger where boot camp expired my iMac is alu 2.8 4GB and 2600xt please help me solve this. thanks.