On Tue, 16 Aug 2016, Ryan Coleman wrote:

> The only way Comcast puts anything on your system is you INSTALLED it
> yourself.


Nowadays they probably just send you a CD or something, but in The Olden 
Days they /definitely/ tried to install stuff on your system. This is back 
in the days when they expected your modem to be connected to a single 
computer rather than a router, too. So if you left the tech alone and 
didn't sit there to make sure you know what they're doing (and stop them 
from such shenanigans) they may well have install stuff on your "main" 
computer!