If your Wi-Fi goes out now (or in the future), Microsoft's latest advice is to restart your computer. It's important to note that this refers to restarting the computer rather than shutting it down and then turning it back on. By pressing the Start button, then the Power button, and then Restart, you can restart your computer.
These can be interesting at times, but they're usually a pain to deal with, especially if they replace a favorite wallpaper. Fortunately, they are simple to remove. Getting rid of these ads may also help with performance, as it is one less thing for your device to worry about (not that the difference will be much, but every little bit helps).