yes i have installed the mp3 player utilities, but it is my adfuupdate that is causing all the problems, maybe the hardware detail shown by the Pc may be incorrect.
BTW, i bought my mp4 from a new zealand auction site (TradeMe), here is the exact same model (except for the color)being sold by the same member who sold me mine.:
http://www.trademe.co.nz/Electronics...-128754403.htm