No, I wrote a DVD with music on iTunes, I don't think it is relevant. But the weird thing is that before, everything worked normaly. The DVD-rom didn't work proprely from the moment my syster tried...

Well, I have a quite new pc and something wierd happend with my DVD-rom. Sudently it stoped reading all my DVDs, it reads CDs, movie DVDs, even a data DVD with some movies or a DVD I wrote with...