Ipod Not Recognized On Computer

[sten102]

Hi,
My ipod classic (7th gen) used to work fine and was recognized on my PC and in iTunes. BUT now it has suddenly stopped being recognized on the PC. My other ipod classic works fine and is recognized by the PC and iTunes as soon as I plug it in (same dock with the same lead), so it can't be anything to do with the lead / USB / dock.
I have tried resetting the ipod, uninstalling & reinstalling iTunes, to no avail.
Can anyone please help?!
I use Windows 8.
Thanks,
Mike

[Buenchico]

Start here:
http://support.apple.com/kb/TS1369