NWZ-S639F USB wont recognise..
Hiya I got a NWZ-S639F for xmas but i cant get it to be recognised on the computer. the instructions make out you just plug USB in and it will appear like any other USB device. on my computer when i plug in a pop up says 'New Hardware Found: MTP Device' but nothing else. If I look in device manager it keeps refreshing every 5 seconds with the MTP device looking ok then having a conflict then ok, etc etc. I've tried in my front USB ports and on my USB 2.0 ports which i bought separately. I've had no probs in past with my phone and previous mp3 player, i cant see what the problem is or what to do. when i put it in my friends computer, it says 'New Hardware Found: WALKMAN' then 'New Hardware Found: MTP Device' and seems to work ok. I've got windows service pack 2, i installed latest version of windows media player (not that that'd help). any ideas, im really not sure what to do? thanks a lot