Hello, Recently my disk drive (optiarc dvd rw ad-7201s5) on my Dell XPS desktop stopped reading any disk I put into it. I previously had Daemon Tools Lite installed, and uninstalled it. This problem arose a few weeks after the uninstall, after I moved my computer into another office. What I've tried: Upgrading from Vista to Windows 7. Clean install of Windows 7. I've checked all connections and wires. I have updated the drivers. I have uninstalled and reinstalled the drive. Upper and Lower filters do not exist in my registry. I have replaced the disk drive entirely, same problem. WHAT is going on here? After the upgrades and such I am running Windows 7. Any help would be appreciated.