I Have A D- Link Router And It Was Working Fine For My Dell Laptop.

It seems that the issue is with the wireless connectivity on the system.

Check for the Network Icon on the bottom right corner. Please check if you are getting a Yellow Exclamation mark, Red Cross or do we have all 5 white bars.

The white bars indicate the system is connected to wireless network.

In case it shows:

Red Cross - You can turn your computer's wireless networking function on and off by pressing the <Fn><F2> key combination.

Yellow Exclamation mark- Means that there is limited connectivity. This might be due to passcode or the internet. Please check the cables connected to the wireless router and the modem.

Orange symbol- Indicate the wireless network is available. But the system is not connected to the network. Once you click on the icon it will show all the wireless networks available. Please select the wireless network and enter the passcode it would work.

For me to help you in a better manner, I need a few details from you:
 
1. Are you getting any error message when you try to connect to Internet?
2. Are you able to connect to internet with a wired cable?
3. Do you have any other computer which connects wirelessly at home with the same router?
4 Please let me know the Operating System which you are using?

I would recommend you a link which will give you step by step information about wireless connectivity. Please click the link below:

http://dell.to/RcmkVA
 
once you click on the link, it will first ask you to click on the Operating System which you are using and follow the step which should resolve the issue.

 
When you click on the Operating System it will guide you with the steps to follow which should resolve the issue. 

We can also try to boot the computer in safe mode. To boot the computer in safe mode, please switch on the computer and start tapping the F8 key which would take you to Advanced Boot Option screen. Using the up and down arrow key, select Safe Mode with networking to boot the computer into Safe Mode.

Please check if you are able connect to internet in Safe Mode with networking 

You can also click on the link below which will give you steps to login into Safe Mode: 

http://bit.ly/8X5sKf 

Some more steps that you can follow if the above mentioned steps don’t resolve the issue. 

Please reinstall the network drivers of the computer. Please click on the link below to download the drivers:

dell.to/uIo3ef

Please enter the Service Tag, select the Operating System you are using and then download wireless drivers, which should fix the issue.

Please respond for further assistance.

Thanks & Regards
Rathish C
#iworkfordell