Go over these steps and tell us where the breaking point is.
Check the Device Manager for valid Wireless card entry.
http://www.ezlan.net/Win7/net_dm.jpg
If there is No valid entry, delete any Bogus Entry, and re-install the Wireless card's Drivers.
Check the Network connections to make sure that you have a Wireless Network Connection Icon/Entry, and that the Properties of the Icon (right click on the Icon) are correctly configured with TCP/IPv4 protocol in the Network Connections Properties.
http://www.ezlan.net/Win7/net_connection_tcp.jpg
Make sure that if there is a vendor's Wireless Utility the utility is Not Running together with the Windows native Wireless utility.
----------------
Make sure that No Firewall is preventing/blocking the Wireless components to get to the Network.
Some 3rd party Software Firewalls keep blocking aspects of Local Traffic even it they are turned Off (disabled).If possible configure the Firewall correctly, otherwise totally uninstall it, and get rid of its residual processes to allow clean flow of local network traffic.
If the 3rd party software is uninstalled or disables, make sure that Windows native Firewall is
On.
---------------------------
Working TCP/IP stack should look this way.
Right click on the Wire card Network Connection, choose Status, Details, and see if it got an IP and the rest of the settings.
http://www.ezlan.net/Win7/status-nic.jpg
Description is the card manufacturing data.
Physical address is the card's MAC number.
The xx should be a number from 0 to 255 (all xx same number).
yy should be from 0 to 255
zz should be from 0 to 255 (all zz the same number.
The lease date should be valid to the current time.
*Note 1. IP that starts with 169.xxx.xxx.xxx is not valid functional IP.
*Note 2. There might be an IPv6 entries too. However, they are not functional for Internet traffic or LAN. They are needed for Win 7 special HomeGroup configuration.
---------------------------------------------------
A message in the Wireless little Window that says Connected does not means that your are really have a valid functional connection.
If everything above is OK you have to be able to connect to the Router.
Connecting to the Router means that you can enter the Router's core IP into an address bar of a browse, be able to connect, see, and configure the Router's menus.
If it does not connecting to the Router, log from any computer that can connect to Wireless Router with a Wire, disable the Wireless Security, make sure that the Wireless broadcast SSID is
On, and try to connect with No Wireless security.
Enable the Wireless security after you mange to establish a functional connection.
----------------------------
On Security Suits (Firewalls) uninstall.
When the suspicion is that a 3rd party security suit blocks the connection.n situation like this there are two options with Security suits.
1. Manage to configure them correctly so that they do not interfere with LAN Traffic.
2. Getting rid of it.
Disabling the firewall usually means that it does not filter the Internet traffic. However, all the processes and the "junk" that intercept LAN traffic is still there running in background and interfering with the LAN’s traffic.
Even uninstall sometimes leaves behind services, and running processes and you need to find a page like this,
http://mintywhite.com/windows-7/7security/8-antivirus-uninstall-utilities/
The only way to make sure that the system is clean is to run Process Explorer and make Sure that nothing relating to the security suits is running in the background.
Process Explorer,
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
Facebook
Twitter