My windows xp laptop could read data dvd's and movie dvd's. But after reinstalling windows xp, the dvd rom can only read cd rom but not data dvd's or movie dvd's anymore. I use windows xp's troubleshooter. It told me that the machine already has the latest dvd rom drivers installed. Why can't the dvd rom read data or movie dvd's? What do I need to do? Do I need to reinstall something else?