My computer - click drive - open drive - select folder - right click - properties - sharing tab.
You need folders on both PCs shared or you will not be able to access the other PC.
My firewall is Zonealarm and is set to the highest security setting. If I reduce this to medium, can't outside PCs (other than my kids PC) connect to mine and wreak havoc? Leave at high and:- Create a Trusted Zone If you have two or more computers connecting to the Internet through a router, you can create a Trusted Zone. Click Firewall in the ZoneAlarm Control Center, then click the Zones tab. Click the Add button and enter your other computers' local IP addresses. You can set Trusted Zone security to let your computers share files and disk space.