Ajaaykannan,   Try reading... Software Updates Causes Wireless Connectivity Issue Or Unable to Connect to Internet  If the article does not help solve the problem, Can you run Finding System Information REMOVE YOUR PRODUCT ID, if using XP, run an ipconfig /all log and post it back here.  Also include the virus program and firewall you're using.       Rick
I have Inspiron 14R using it for more than 1 year, from yesterday im not getting the internet connection but it detects my Wifi connection. Wifi router has been resetted and turned off, but it doesnt connect. Wifi is connecting in my mobile but its not connecting to my laptop.
Wifi is connecting but not getting the internet connection