HELP!!!

I Networked my PC with my Laptop (Both winxp sp2) and transfered over 25GB of data to the laptop.

I then formatted the pc, reinstalled sp2 and re-established the network.

I dragged the 25GB+ Bakup folder from the laptops shared folder to the pcs shared folder.

The copy dialog came up and I went to eat.

When I got back, the dialog was gone and less than half the files had been copied. Cannot find missing files on either laptop or pc.

ANY SUGGESTIONS GREATLY APPRECIATED!

i really need your help guys.