Glad you asked...
To make comcast your home page go to tools, then to Internet options, on that page enter in comcast's website and set it as your default. Close the page and reopen it and Comcast should be there.
Then again, this answer might help you...
In order to make Comcast your home page, you would first need to visit the page in your web browser. In the upper left corner of the page, click on the link that says Make This My Homepage.

