i rly dont know how to fix this problem,i have Both connection in my Dorm, Lan & wireless when i try to connect to lan i have coonection and the skype and all other msg are working but i cant access to web pages in IExplorer or chrome but when i change coonnection type to wireless every thing work prfectly,another thing is i have access in Lan by VPN!! ,does anyone know how to fix it?

i checked the proxy in internet option ,scan computer by NOD32 many times and...but still doesnt work:(

This is likely a network configuration issue that has zip to do with your system. Post a help-desk request to your network support team.