Map a network drive?
First get the ip address of the computer with the share folder you wish to access.
Start - Run - ipconfig (get the ip from there)
Ex.) 192.168.1.5
Locate the shared folder name
For now lets pretend the folder is called Share
On the computer trying to access the shared folder open any folder
Go to Tools - Map Network Drive
Choose a letter for the drive: Any not used is fine Z:
Then for the location type for ex.) \192.168.1.5\Share
Click Finish
Then it should pop up the shared folder.
If not, go to My Computer and it should be there.
See if that works, if not, somewhere along the network sharing is messed up. Maybe the permissions.