Yes ipod

Ive used the searchbar

so i unplugged my ipod last night while it was in my computer and said "do not unplug."  i did this because it froze my computer while i was trying to put about 200 songs on at once.  after i pulled it out an image of a folder cam up on the screen  and then the apple symbol, now all the music is gone. when i plug in my ipod to try to put it back it says it cannot read the contents of my ipod and to use the ipod software updater application to restore it to factory settings.

what does this mean? where do i find it? should i just give up and buy a zune?