In the PC, open "My Computer", double click your "C" drive and, in the right pane, right click a blank area and select New and then Folder. Give the folder the name "Test". Right click it, select Sharing and Security and set it as "shared" with the sharename "Test".
Now in the laptop, open "My Network Places" and, in the address bar, type in:
and press Enter. Does that let you access it?