Connect a Computer to the Internet

Step 1: Connect your modem

Step 2: Install your Ethernet NIC and cable

1. Turn off and unplug your computer.
2. Disconnect peripheral devices (such as printer, monitor, and keyboard).
3. Follow the installation instructions shipped with your Ethernet NIC.
4. Make sure the coaxial cable is connected to the modem.
5. Plug into a grounded, surge-protected outlet.
6. If the cable modem has a power button, turn it on.
7. Connect your Ethernet NIC to your modem with an Ethernet cable.

Step 3: Run the Installation Software

Check that your computer is ready for high-speed Internet (and set up your email) with XFINITY Installation Wizard.

1. Launch a web browser and download the installation software.
2. Run the software and follow the prompts.
3. Accept the software license agreement and the Comcast Agreement for Residential Services.
4. Choose a username for access to the xfinity.com website and to your email. (For example, if you choose the username "sample," you'll log on to xfinity.com with the username "sample," and your email address will be sample@comcast.net .)
5. If you're a Windows user, download additional features to complete the installation.

Having Trouble?

• Try restoring your connection
• Check that your power strip is turned on and all cables are securely connected.
• Unplug your modem for two minutes. When plugging it back in, wait for its lights to come back on before testing your connection.
• If you have XFINITY® Voice service and are using an eMTA modem, press the reset button on the back of the unit with a pen, paper clip, or other pointed object. When the unit's lights come back on, re-test your connection.
• Connect the Ethernet cable directly to your computer (avoiding routers and network devices). If this restores your connection, the issue is likely with your router or configuration.
• Restart your computer and re-test your connection.
   

Still need help?

• Get ongoing 24/7 access to tech experts at xfinity.com/signaturesupport .