I need a help desk

This is getting really old. I keep losing my internet connection on my laptop. It will drop for a few minutes and then miraculously show back up again. If I move my laptop over slightly to the right, it drops again. And it happens most often when I am in the dining room, which is where the router actually is. I make sure that there is a clear path from the table to the router, but it still drops a lot.

How can I find out if it is my laptop or if it is the router? I would feel better if it was the router, since that is easier to replace than my laptop would be. It isn't one of the better known routers (it isn't a Linksys router), and we have been using it for about three years now. So maybe that is the problem. I just don't know...