Question: Direct tv and network



I recently connected my computer to tv that is also connected to directtv. Something seems to be sporadically interfering with my ability to go on line or stay online.

My server is at&t and they can't find whats causing the problem. Best Buy techs went through my computer and they couldn't find anything wrong with my computer. geek squad took over my computer and they couldn't help. Was wondering if its possible that my direct tv connection is interferring with my gateway to the internet.