If you are trying to access files on your laptop from your desktop, you may need to add File and Print Sharing as an exception under Windows Firewall, or if you are trying to remotely connect to the laptop add the exception for Remote Desktop.
By the way, I highly recommend if using your laptop outside of your home network to install a better software firewall, such as ZoneAlarm.
By the way, I highly recommend if using your laptop outside of your home network to install a better software firewall, such as ZoneAlarm.