Hopefully, people who have this problem in the future, you read this before you follow Ricky RockStars directions because he has mental problems. After seeing his answer here and then others and how wildly incorrect he is, I did some digging. I saw one of his posts on a forum from another website where he calls himself, "the puppet master" and he said he finds his answers on google. He says Dell is not his only place to throw out random answers to see if an stick. Apparently, he does this on 'yah** answers' and other forums, too. He's not a real expert, and instead of saying he doesn't know, he will just bark out random directions to try to troubleshoot non-problems or problems that can not even be fixed, as he did here. He just loves the power of people listening to him. He really has no clue what he is doing. He just googles your problem and tells you what he finds as if he knew it. The problem with the is that if you already did that, he will find the same wrong information you did or even worse information like he did here. I have seen many of his answers and about half are correct, 1/3 are wrong and just waste peoples time, and the other 1/6 are harmful. Look at what happened here. He should have just said what I say below but instead he had a back and forth for days because he loves the control.  Seriously, I don't understand how Dell lets this happen. He's all over their forums giving bad advice and using people as "puppets" in his weird game to control the actions of others. Here is the real answer: Dell Vostro 3550 does not support 5Ghz WiFi Network connections. There is nothing you can do to remedy this problem besides changing the hardware(going out and buying a 5Ghz USB adapter).
I have a laptop dell vostro 3550 with windows 8.1 pro.  It can't show and connect to 5ghz networks. it recognize and connect  only to 2.4ghz networks.  All the othes devices that i have AT HOME,  connect to 5ghz and 2.5ghz networkS  with NO problem (IPAD with iOS 7.04, , IPHONE 5 with iOS 7.04, IMAC with OS X V10.9.1, MAC MINI WITH WINDOWS 7 AND OS X V10.9.1, ETC) Dell what is the problem? Is it a limitation of the vostro 3550  internal wi-fi card? Is it a Windows 8.1 problem?   I appreciated HELP of the communit and from Dell!  Thanks  Wilson Dias
Vostro 3550 wi-fi 5ghz can't show the network name if visible and can't connect 
to it on windows 8.1