hmmm i never thought that my lens could be dirty...... well i dont think i mentioned this but like any dvd thats in the drive will read, and so far it will rad my juno cd everytime, it kinda read my medieval total war cd, and it read my mobo cd one time. i tried switching my ide cables with my hardrive and my cd drive and no dif. so its not that. my hd is set to primary master,and my cd drive to secondary slave and it recognizes it, and Ive tried a bunch of other things, no dif. so ya if i didnt mention the cd drive worked last week cause i had to install xp, and I installed starcraft, and counterstirke all of which dont work now. so do u think it would have gotton dirty by now and just be revolting against cd's? and its only like 6 months old..... i have a 5 year old computer that never once had a dust problem or anything. but ya i will try the registry to.... thanks bunches