So this afternoon, my MacBook lost the signal from my router and then refused to connect. The router takes longer to appear in the drop down list of close networks, and attempting to connect to it causes a dialog box asking if I want to run network diagnostics to appear. I removed the network and attempted to re-add it with no luck. Now when I select the network, a diablo asking for the password pops up after a few moments, even though I have already entered the password. When I type it in, it tries for a little while, then tells me either that the password is invalid (it isn't), or that the connection timed out. During this process, my iPad suddenly refused to connect, saying that the network couldn't be found. The network doesn't even show up in the list of nearby networks. Attempting to add it as "other network" fails - it tells me only that it couldn't be found. Restarting the router did not help. The router's configuration page was by all appearances still the same, too. I use WPA2 Personal and do not have the SSID hidden. I have attempted rebooting both the MacBook and the iPad to no avail. I have tinkered with all network settings I could think to try on both devices. My Android phone, my girlfriends HP notebook and her iPhone 5s are all able to connect without any issues. My MacBook is a late 2008 Unibody running Mavericks, iPad is an iPad 4 running iOS 7. Any advice?