If you can use something, it's useful. Useful things are handy for whatever you're doing. If something is just what you need or you just find it helpful, then it's useful. A hammer is useful in building many things. Coasters are useful if you don't want a coffee table to get stains. College degrees are useful â or necessary â for many careers.
Where is the security key on a comcast modem located? The security key on a Comcast Modem is located next to the serial  number of the unit. Sometimes the serial number is the number used  as a security code if it is not printeâ¦d on the device. (MORE) 1 person found this useful.
Check your browser settings. The Remember Me functionality is done via a Comcast cookie. If you delete your Comcast cookies, you lose that remembered userid. If your browser is set to delete cookies automatically at closure, that will do it as well.I'm using this software called Lastpass (https://lastpass.com/) which is great.e: Cannot stay logged in to email. Having the same problem. All other passwords and log-ins work. However comcast/xfinity makes me log in every time no matter what I do. Once I log off, or shut down the computer, I have to re-enter my password. this is getting old! the only site that has this problem.