Is your internet not working, even it shows its connected to internet? A common (and simple) solution to this problem is just to renew the IP address of the PC. To do this, follow the following steps:
1. Open the "Run" dialogue box. (Start > run or Windows Key + R)
2. Type "cmd" and press enter key ( without quotes)
or you can go mannually from Start > Programmes > Accessories > Command Prompt
3. Now, Type "ipconfig/release" to release the current IP address
4. Then, Type "ipconfig/renew" to renew the IP address.