Support XFINITY Internet Get the Most From Your XFINITY Internet Service


Maximize your Internet experience.

The equipment you use to access the Internet affects your Internet speeds. Find out how to maximize your online experience below.

Your Computer

Our Recommended System Requirements
Your computer's processor speed (CPU), memory (RAM), operating system, and your browser all affect how fast your computer performs.

Processor Speed (CPU)
The faster the processor, the faster your computer runs. We recommend a minimum of 1.5 GHz for PCs, and at least 800 MHz for Mac.

Random Access Memory (RAM)
RAM is the temporary storage place your computer uses to do its calculations. The more RAM you have, the faster your programs run. We recommend at least 1GB for PCs and Mac. More is better.

Web Browser
We recommend using the latest version of your favorite browser.

  • Internet Explorer
  • Firefox
  • Safari

Operating System
Upgrading your operating system (OS) helps your computer run faster, and make it less vulnerable to viruses. We recommend:
  • Windows XP or higher
  • Mac OS X 10.4 or higher

Optimize your computer's Internet connection
The Comcast TCP Optimizer is a free, easy-to-use tool that helps you make the most of your Internet connection by modifying your network settings. The Comcast TCP Optimizer is designed for Windows XP computers only
Optimize Now

Remove Spyware from your computer
Spyware is a form of malware that transmits personally identifiable information from your computer over the Internet to another party – without your knowledge. What's more, spyware can slow your computer down. Spyware is installed secretly on your computer when you surf the Internet.

Remove spyware from your computer by downloading and installing our XFINITY Toolbar. This includes Spyware Scan, which provides you with spyware detection, cleaning, and quarantining capabilities.

Get rid of computer viruses
Included with Constant Guard we offer the top-rated Norton Security Suite, which helps protect your computer from viruses, hackers, and online predators, and keeps your identity protected online.

Download Norton Security Suite

Free up hard drive space
Your web browser has a Temporary Internet Files cache, which contains a record of everything you've downloaded, such as images, web pages and cookies. This takes up space on your computer, and causes it to run slower. We recommend clearing your cache on a regular basis.

Run a Windows Defrag and Scandisk
If you use Microsoft Windows, tune up your file system to ensure it is running properly, with Defrag and Scandisk. Defrag defragments your disk, and organizes your file system to help Windows read files faster. Scandisk checks your hard drive to make sure it has no problems. We recommend running these two tools once a month to keep your computer running at peak speeds.

Your Modem

If your Internet connection seems slow, check to make sure you're using a Comcast-approved modem. Performance, Blast! and Extreme 105 customers should use a DOCSIS 3.0 compatible modem. Then power cycle (reboot) your modem, which will also download any available updates.

Whether you use a cable modem for XFINITY Internet-only service or a digital voice modem to access the Internet and make phone calls, here's how to power cycle your device.

Your Wireless Network Equipment

The three major wireless standards are b, g and n, with n being the newest and fastest. We recommend using an 802.11n-capable router as it provides the best coverage and fastest wireless speeds.

For more information on this topic, please visit our Help and Support Forums.

Find this article at: