Cannot connect 192.168.1.X from another local computer

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http://serverfault.com – I want to connect my apache server from another computer. But I cannot. My windows firewall is disabled. Other computer's firewall is disabled. My local ip address is Port is 80 of course. Both computer are windows. No antivirus softwares in both computers. What can I do now? What is the problem? (HowTos)