I have a desktop and a laptop. In the last few weeks, i have noticed an increase in the number of times that i get "disconnected" from the internet.

I am using a D-Link to connect wirelessly (i am too far from the router to get connected directy) on my desktop. I know it is not the router that is the issue as the laptop does not get disconnected when i notice it on the desktop, so i am suspecting a hardware issue. When it happens, i can just open the Network and Sharing Center, where i see the red x between the house icon and the internet icon. Once i click on that X, i get the Windows Network Diagnostics window open, and after it "works" for a minute or so, i get these problems found:

The connection between your access point, router or cable modem and the Internet is broken - Detected - (and i have a warning icon)
The default gateway is not available - Fixed - an OK icon

Once that appears, the connection is restored. (until the next time)

I am wondering how i can check whether it is the D-Link that is the problem or something else, before going and buying another one "to try".

Thanks