I'm a little confused about the status of your network adapter. Can you check to make sure your wireless network adapter(s) (wireless and physical) are set to "Obtain an IP Address Automatically" and to "Obtian DNS Automatically".
After this can you reconnect to the wireless network? Try the internet. If the internet still doesn't come up flush your temp files, close the browser and retry the internet. If it's still a no see below:
If so, can you try and do some simple "ping" diagnostics?
Open a command prompt:
1. Click on the START MENU and select RUN
2. Type in: cmd
3. Click OK
4. Type in >ping <ip address of wireless router>
Example: >ping 192.168.1.1
5. If your results are 4 "request timed out" then you have not established a wireless link yet. I would try and do a factory reset of the router and start over from scratch. A factory reset can be done by simply holding the "RESET" button on the back of the router for about 20-30 seconds.
6. If your results are 4 replies then you can run the next test.
7. Type in >ping 18.104.22.168
8. 22.214.171.124 = a public DNS server. If you get replies then your are on the internet, but it appears that name resolution is a problem. All this means is that when you try to go to www.google.com
the DNS server that you should be contacted to find your way isn't able to tell you what the actual IP address is of www.google.com
and so you go nowhere.
9. Provided you're set as a DHCP client (meaning your network adapter is set to "Obtain an IP address and DNS automatically" it means your wireless router (if it's the DHCP server - this is the default configuration) is giving you the wrong information for DNS.
10. I would contact your ISP for the correct DNS servers and make sure they are configured properly on the Router.
11. You can see what DNS servers you are actually getting from the Router if you run the following command from a command line: ipconfig /all
Hope this is helpfull.
Let me know if I can help any more.