So my MBA keeps dropping wifi for some reason. It happens ONLY on my home network, and ONLY to my computer. I'm the only mac on the network. Every other wifi network is perfectly fine, every other computer on this network is fine. Many things can happen. It could say it's connected, but not be able to access the internet (whether it tells me that there's no internet access or not). It may just drop wifi altogether, and refuse to connect (see pic). Generally, if I unplug the router and plug it back in, it's all good. It also works if I restart my computer. This happens multiple times a day. Yesterday I did everything I know to get it to connect (restart router many times, restart my MBA), and nothing worked. Eventually it just magically worked. How can I stop this from happening? We got a notice from comcast a while ago saying that a bot called DNS Changer was detected on one or more machines on the network. I'm assuming that this can't be me, right?