Hello, i am having a problem with my wifi router. I have two computers, desk computer and a laptop. An IT guy came and installed router. It was working perfectly until last week. Now my desk computer has internet almost all the time but my laptop doesnt. Ive tried restarting, reinstalling and other stuff but still it shows connected and my laptop doesnt have internet. Some excess questions. What i WAN and what is it for? And in what port should the internet cable go, if i remember right i had it in 4th one, or should it be in any other?