Hi,everyone. My n10 just got a ridiculous problem. When I linked the md with pc using the usb cable, the system tray popped up a notice saying "usb device not recognized"(pic 1). Under the usb controller section of the device manager, there was an "unknown device" tag(pic 2). I also found the main screen and the remote controller screen appeared a notice of "PC>>MD", however, the Sonicstage didn't find the md device out after I opened it. After I unplugged the usb cable, the notice of PC>>MD still remained on both screens, I had to turn off the switch on the back of recorder to sotp it. My os is winxp and the version of SS is 4.3(pic 3).I had thought it might be my system incompatible with the software,so I re-installed my os, the new environment should be perfect to the rigorous Sony's software;I did install all of the necessary files and drives which were from this site.I also tried installing the older 1.5 verison,however, nothing changed. Has anyone got any ideas or suggestions to sovle the problem and let the md work properly? Thanks in advance.