This is going to be one of those questions where I get yelled at to search the forums using a slightly different search string than what I used... But I can't play DVDs. Data and music cds work fine. Burning is fine. But every DVD I put in is unreadable and unmountable. DVD icon doesn't show upon desktop, DVD Player gives me a "Supported disc is not available" message. Its not just one damaged DVD, its a whole sampling of my collection and other programs like VLC don't help anything. Any ideas of what could be wrong?