I have a Nec 3500-ag everything was working perfect...until I restarted my computer and now my computer is showing up now as a removable harddisk I'm running windows xp sp2. I enabled Extended System Configuration Data then everything worked again....then restarted again and now it's back to the removable harddisk again. I checked disk management and it's not there. Then I checked device manager and it's under the disk drive. Should I uninstall it from device manager and then install it again?....What should I do?