I have nothing else connected to the computer, it is a centrino duo laptop 1.83 with 1g ram running windows mce. I have no conflicts usb or otherwise. I do not know how to uninstall ss4.0 without losing library. Is there a reason I can't upload mdlp files? Why cant I hear playback of regular md's through the computer speakers? Thanks for the time. This is the fourth unit I've owned, starting in 2000. My nh1 was stolen from my car, which forced me to buy another unit in order to access data files I'd stored on minidiscs. Again, thank you.