I used to have Ubuntu 13 installed on my computer, it was the only OS in this computer. One day I was at home, connected to my usual wireless connection, watching a show, and suddenly it stopped loading the episode and I lost my connection. From that moment on I am able to connect to other wireless connections, but not my own, my network doesn't even appears in the list. Everything is fine with my wireless connection, because it continued to work fine in other computers. I didn't change my internet provider or any equipment. This happened several days ago, since then I restarted my computer several times, I unplugged and replugged the router cable, I even installed Ubuntu 14.04 on my computer, which I am using now, and nothing worked.
PS - I'm fairly new at Linux.
If anyone can help me, thank you. Miguel Pinto