What if I can't access the computer on the LAN Windows7 system?

We often encounter problems with the computer
of the Win7 system in the LAN of the home or the unit. The reason is that the firewall that comes with the Windows
7 shields the port 80. . The solution is to reset the rules for the Windows
7 firewall. Here's how: Open “Control Panel →System and Security→Windows Firewall", click on the left side “Advanced Settings", then click “Inbound Rules", and then click on the right side “New Rule ”, in the "type of rule to be created", click on "Port", next, select "TCP", click "Specific local port" and fill in 80. Next, point Select "Allow connections", then click Next; check the domain, private, and share according to your actual situation, then name the rule, and then you can let other computers access it.