connected but no internet access

[Couch Potato]

For some reason, my Dell Inspiron sometimes refuses to connect to internet via Wi-fi. So far I've had this problem at home, but not elsewhere. Internet on my smartphone always works, but when I open my laptop it says "connected but no internet access". What should I do in this case? Right now everything is working OK but sometimes it doesn't and then I have to wait and the problem resolves itself without my doing anything about it.

Could you please tell me why this is happening and how I can resolve this?

 

[avinashagunde]

flush your network connections...
go to cmd prompt
type
ipconfig/release(enter)
ipconfig/renew(enter)

 

[VirtualLarry]

what OS, what ISP, and what router model?

 

[Engineer]

what OS, what ISP, and what router model?

Also, any laptop adapter brand information (Intel, etc). I've had this happen on Atheros chipset adapters until I found a newer driver to fix it.