corrupt file??

i've just sent my fourth ipod off to repair after having gone through the usual rigmarole of resetting, attempting to restore, uninstalling/re-installing etc etc. and everytime i receive a new ipod back i think i do everything as i should, but then it goes wrong again.... which has left me thinking that maybe it is one of the files that i put onto my ipod that is causing the problem, rather than an inherent issue within the apple/ipod software.

does anyone know if this could be true? and if so is there anyway i can tell which file it is? any form of program/scan of some sort?

or am i just wide off the mark and this problem doesn't exist?!

many thanks for all help given!!!


Windows