i too am having the exact same problem after changing mobo. but i have an abit mobo, i had an asus mobo before and it worked fine. i've tried everything that everybody has said to try, with the same results. as far as i can tell the only thing we have in common ( besides clovedvd not writing D/L ) is that we've changed mobo's and maybe it has something to do with SLI mobo's ? i have an ABIT KN9SLI.