Unstable internet connection?

[Southpaw]

As you are talking about signal reception you must be using WiFi which is a two way radio signal between your router and your pc and as such is subject to interference from nearby electrical devices working on the same frequency.
The router has a more powerful signal than your pc, so the pc may tell you that the signal is good, but the router may not be able to detect the signal back from your pc.
Your internet does not have a "channel" and is not the problem, but your WiFi does and a channel change might improve things for you, as might other changes.
Have a read of Tony Northrup`s excellent article on the subject;
http://aspenitcouk.wordpress.com/2013/05...s-network/
Somewhere for you to start, best of luck, Bob.