How do I get a Windows PC to access the wifi network?

Question

I have a Time Capsule, I curently have a Mac Mini, a Dell Dektop, a MacBook Pro, and an iPod connected to the wifi network. I am now attempting to connect a brand new Windows 7 Toshiba Satellite and a Lenovo thinkpad. The new laptops recognize the wifi network but will not transfer any data, therefore they cannot acccess websites....
What could possibly be the issue...?

Answer 1

Ok, this validates that the PC is at least negotiating with the Time Capsule and can find the TC's DHCP server to get the proper IP addresses.
Let's go to the last phase of the troubleshooting to find out where the communication break is between the PC and the Internet site.
This time we are going to rely on the trusty Ping tool:
Since you verified that the PC is getting the proper IP address information from the TC, we can skip the first three levels of Ping tests: loopback, local computer, and LAN-side of the TC.
The next in line for the Ping test would be the Default Gateway. This would be your ISP's Gateway router. To know what to Ping you may need to go to one of your other devices that can successfully negotiate its way to the Internet. You can get the Default Gateway info from the AirPort Utilty. AirPort Utility > Select the TC > Manual Setup > Internet > TCP/IP tab The Default Gateway = Router Address
Ok, now go back to the PC, open a Command window, and enter the following at the command prompt: ping <IP address of the Default Gateway> If the ping fails, there is either an issue with the TC or the ISP's Gateway router. If the ping passes, go on to the next step.
Ping the IP address of the remote host. That is, instead of using the URL (like www.google.com) use the actual IP address of the website. If you don't know the site's IP address, go back to your Mac, and then, use the Network Utility's Lookup option. Enter the URL of the site, and then, click on Lookup. You should find the site's IP address in the information returned in the panel's results window. If the ping fails, the remote host may not be responding. Try another host just to be sure.
Finally, ping the URL of the remote host. This time instead of the IP address go ahead and use the site's URL. As an example, enter the following at the command prompt: ping www.apple.com If the ping is successful, you're done and the computer can successfully negotiate all the way to the remote host. However, if the ping fails, then the issue is either there are no DNS servers configured or none could be found to translate the URL to the appropriate IP address to "find" the website.