Each computer/laptop should have their own IP address, e.g 192.168.20.1 & 192.168.20.2
Both should have the same Workgroup Name with each having it's own unique name, e.g. laptop1 & desktop1.
Enable filesharing, Disable the Firewall when networking, re-enable the Firewall once networking is complete.
If you have Norton anti-virus turn off the Firewall in that also.