I have a new custom Clevo laptop with a Samsung/Toshiba BD-RE internal optical drive (TSST SN-506). The drive would not read blu ray movies using Cyberlink PowerDVD 11 Ultra giving a message of "No disk in drive E:". It reads DVDs and other CDs fine. The device appears in device manager with no errors as well as my computer. The vendor sent me a new drive, this time a Panasonic. Same problem and message. Hours on the internet provided no definitive resolution. THEN I tried something I read. I uninstalled the drive and powered off the computer. When I powered back up Windows 7 Pro found the device and installed drivers. I tried 2 different movies and both played. This procedure worked on both the optical drives. BUT, after letting the computer sit for a while I tried a movie and got the same "No disk.....". Am I condemned to having to uninstall/reinstall my optical drive every time I want to watch a blu ray movie? During my extensive reading I saw people talking about deleting the upper and lower filters in the registry. But this seemed directed towards error messages in the device manager which I do not have. Any help/advice would be appreciated. Thanks in advance.