Solved Wifi was working, now it's not

Hello everyone, I'm having trouble with my wifi. Unlike many other cases, my wifi worked after I installed Windows 8. However, yesterday we messed around with our wifi (we set up two networks - one regular, one as a guest network), and eventually my computer stopped showing any wifi networks at all. There are 3 networks around me, one is our neighbor's network, two are ours. One is a guest wifi, one is our regular wifi.
I have a dual boot setup with Ubuntu and Win8, so I tried booting into Ubuntu. Ubuntu recognizes all the networks around us, and so do all the other computers on our network. Ethernet still works, but after resetting the wireless adapter without an ethernet cable attached, the computer doesn't even recognize any networks at all (still no cables attached). After resetting the wifi adapter, there is no way to see any networks besides ethernet anymore.
Help! How can I get my wifi working again?

I guess I should be more specific about my hardware. This is on a Toshiba Satellite L855-S5280P with a Realtek wireless adapter.

I'm disappointed that nobody was able to help. I was almost to the point of reinstalling the OS when I remembered I could try a system restore. Restoring it to a point before when I installed Virtualbox fixed the problem. Virtualbox's networking system where it connects the virtual machine to the computer's wifi adapter makes a network of the name "Unidentified Network" show up, using the ethernet symbol. Once that's on, there's no fixing the problem unless you restore the system to a backup point or reinstall Windows 8, as far as I can tell.
Long story short, stay away from Virtualbox until they get an update out. Solved!