i inserted the player without battery into usb and at the same time kepot the play button pushed down. i was patient and finally the computer recognized the
device (USB Human Interface). then downloaded software version v.1.2.5.0 from rca audiovideo to the device. it works fine now. just be patient with it. its really not a bad little player and it has alot of great features (Micro sd and voice recorder and aaa powered) that other devices don' t have and you cant get anymore (try taking your sansa on a camping trip with no electricity)
kklein
December 2010