Hi every body I have a problem which seems to be common. I cant access my wirelss network unless I disable the security opetion(no password required) I am using windows vista I have other computers working fine (windows 7).

What you mean go to your router and disable the security opetion(no password required)? Please open cmd and type: ipconfig. Please post the result of the ipconfig command from cmd.I want to see is there any misconfiguration.