Since the router is in my room now, the desktop can't connect to the router by ethernet cord since the desktop is in a different room. I have tried Firefox, Google chrome, and Internet Explorer all failed. This is the first time that my desktop is using Wi-Fi. In the image included in the OP show that my desktop is connected to my router wirelessly via USB wifi card, but it says it is not connected to the internet. Meanwhile I can surf the web with my laptop. Sorry for the wall of text.