I suggest you to follow the steps from the link below and check if it helps. uncheck the option use a proxy server for your LAN . Enable or disable Windows Firewall Hope it would help.
Microsoft.com/kb/811259 Hope this information is useful. I suggest you try these methods and check the status of the issue.
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It says something about windows not finding a certificate.
The weird part is that I was using WPA TKIP with the passphrase and it was working fine.
Select your encryption type from the "Network Authentication" and "Data Encryption" drop downs.
When I try to connect using the windows zero configuration utility it gets stuck validating identity. I can find the network and connect to the router, but I can't send or receive data. The first thing you can try is when you the Modem and the router is connected to the other, disconnect the power from the router and Modem, wait 30 seconds and then plug in the power to the Modem and once all the lights are solid, then connect the power supply to the Linksys router, now check if you are able to go online. If your Internet Service is cable follow this link If your Internet Service is DSL follow this link I suggest you try these methods and check the status of the issue. I tried to connect directly to the router and I still not able to send or receive data. I did a reset the router back to the settings by default and still no luck. Method 1: Keep the computer in a clean boot and check the status of the issue. uncheck the option use a proxy server for your LAN . Enable or disable Windows Firewall Hope it would help.Revised June 2011 Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. Product Overview, page 1 Getting to Know the Cisco RV120W, page 4 Mounting the Cisco RV120W, page 6 Connecting the Equipment, page 8 Setting Up the Cisco RV120W Using the Setup Wizard, page 12 Using the Getting Started Page, page 13 Navigating through the Pages, page 15 Saving Your Changes, page 17 Viewing the Help Files, page 18 Connecting Devices to Your Wireless Network, page 18 Product Overview Thank you for choosing the Cisco Small Business RV120W Wireless-N VPN Firewall.