Prashanth.Nagabhairava,

What virus program and firewall are you using?

Did you recently install/reinstall the opertaing system? If yes, did you install the drivers in the correct order? How to Download and Install Drivers in the Correct Order

Go to Drivers & Downloads enter your service tag number, then select your operating system. Under Network, download and install the latest drivers.

Try these tweaks....

Start, control panel, device manager. Click on Network and then right click on your wireless adapter, left click properties, power management. Uncheck the box, allow computer to turn off this device to save power.

Go to the power options, and changed the Wireless Adapter Setting, from Maximum Power Setting to Maximum Performance.

Try power cycling the routers and modems?

Power off your ISP modem/router and your wireless router(if any) for 30 seconds. Then power on the ISP modem/router. Wait 15 seconds, then power on the wireless router(if any)

Restart the computer and try to connect.

What happens?

Rick

Hey rick, Thanks for the response :) .. K i am using Microsoft Security Essential as my antivirus program, The last time i reinstalled my OS is around 8-10mnths back and im not sure about the order of drivers installation and i tried those tweaks u suggested and made no difference. I also have ubuntu in my system but i am able to connect to internet using the same wifi :o ... I did reinstall one of my network driver before posting the issue here. Thank you :)

Prashanth.Nagabhairava,

Try using the Intel ~ Recommended settings for 802.11n connectivity

If your router has WPS, disable it. I use these Recommended Wireless Router Settings I use channel 11.

Rick