<human>:  How do I troubleshoot my computer if it isn't connecting to the internet?
<bot>: 
1. First, make sure the cables connecting your computer to the modem or router are firmly plugged in.
2. If you are sure the cables are securely connected, try restarting your computer and your router.
3. Next, check your internet settings in your computer's control panel to make sure they are correct.
4. If you are still having issues, you can try running a network diagnostic on your computer.
5. If you are still having issues after running the diagnostic, you should contact your internet service provider (ISP). They may be able to help you troubleshoot the issue.