devoduo;
Hello and welcome to the forums.
If you cannot see the laptop, then something on the laptop is blocking netbios information propagation. So....
Open network and sharing center and from the left column select "Change advanced sharing settings"
Under category "Home or Work" turn on
Network Discovery and File and Printer Sharing
Then type ncpa.cpl into the search or run dialog box and hit enter
Select then right click the network adapter that the laptop is using to connect to the network and choose properties
Select Internet Protocol Version 4 and click the Properties button then click the Advanced button
Select the WINS tab and select the box that says "Enable NetBIOS over TCP/IP" and OK your way back out of there. Then type
services.msc into the search or run dialog box and hit enter
Scroll down to TCP/IP NetBIOS Helper service and double click
Set the startup type to Automatic and Click the Start Button.
On the laptop, pick one folder or file and Share It just as a test. (Can be an empty folder or a blank text file, doesn't matter, but set the share permissions as well as the NTFS permissions under the security tab as you would want)
Reboot the machine.
Test the new share on the laptop from the desktop by typing
\\TheIpAddressOfTheLaptop\ShareName
and then
\\TheComputerNameOfTheLaptop\ShareName
If that still does not work then,
Inspect the laptop for any third party software Firewalls (ZoneAlarm or Comodo, etc.) and Internet Security Suites (Norton/Symantec, McAffee, AVG, etc.) remove them and replace with
Link Removed due to 404 Error and the built-in Windows Firewall.
Keep us posted.