iPod 5G sync issue with Windows 8

I have an iPod 5G and recently bought a new Acer laptop with Windows 8. I can open itunes and it claims the iPod is syncing but nothing happens. When I try to eject it I receive an error message stating that files are in use with another application. Any suggestions how I can figure out what other application is running these files? I tried to restore the iPod but received the same error message.