Itunes Problem

Hello,
I recently got a new laptop and transferred all my music from my desktop to itunes on my laptop using the hidden files and folders method.
It worked fine and I was able to sync my Ipod on my new laptop without any problems. I didnt open itunes on my laptop since i synced my ipod and now when i go to play any song it's telling me it cannot find the song location.
Is there any way of fixing this without having to delete my entire library and start again?