Originally Posted by
Xuvial
Troubleshooting internet connectivity issues is fairly simple, first ensure the correct Network Adapter is enabled. Rightclick on your little network icon in the system tray > Network and Sharing Center > Change adapter settings > Disable > Enable > rightclick Properties > select Ineternet Protocol Version 4 (TCP/IPv4) > Properties > make sure Obtain IP address automatically is checked > Obtain DNS server address automatically is checked.
Next you need to see if you can ping your own router. Hopefully you know your router's address, most commonly 192.168.1.1 or 10.0.0.1 (but there are many others depending on the router model, you'll need to google it). Run command prompt > type Ping x.x.x.x (router address) > you should get a response. If you don't, there must be a physical cable connectivity problem between your PC and router, try using different cables.
If you do get a response and still can't use the internet...not much you can do other can call up your ISP to verify the issue. Try using the same port that your Mac is connected to.