If you want to take advantage of the Comcast security offering do NOT install the Constant Guard portion.
Having said that, if you are adventurous you could install the entire suite. If it gives you problems Constant Guard can be installed without removing Norton.
Customers have reported various issues with it-the main one being it can cause system slowdown. Of course not everyone who uses it experiences problems.
I think there is an option to install only the Norton portion of the security suite.
What I think you should do is look through the Comcast Help Forum Security Board
and look for topics about Constant Guard. You can then decide what you want to do. Also, if given the option to install the Xfinity Toolbar, say no. It's flaky. If you have specific questions about Constant Guard ask them in the Comcast security forum.
Comcast does not have a stellar history when it comes to branded software. Those of us who have been around the Comcast forums a long time have a saying about it:
"not ready for prime time" OR "a dead rat floating in the gutter".
As a Comcast customer I refuse to use anything they offer. *side note* If you are ever tempted to install the latest dead rat from Comcast which is called Easy Solve DON'T DO IT.
Just for fun here is my review of Easy Solve
Edited by Queen-Evie, 15 August 2012 - 04:11 PM.