Go to the Norton Security Online page and click Get Norton Security Online. Type in your Xfinity ID and password, if you're asked. Create a Norton account, then sign in. https://getsofti.com/en-us/norton Choose whether you want to install it on this device or another one. Start your installation. Click Run. Let the program run. If Windows asks for permission, click Yes.To install Norton Security Online on a different computer, log in to that computer and then download Norton. Comcast now offers Norton Security Online instead of Norton Security Suite, and it is available at the Xfinity website. https://getsofti.com/en-us/norton-setup You are not required to update to Norton Security Online. Norton Security Online has a new look and feel.