In this video, we learn how to reset your wireless router. You can use this if you are getting the "server can't be found" error, and it will work most of the time. First, grab your router and unplug the electricity and DSL plugs that are in the router. They will be round and look like post, and shouldn't be hard to find. After you unplug it, plug it back in after about 30-45 seconds. This will reboot your router, so it will most likely fix the problem you are experiencing. You should be able to connect to the internet, and if you are still experiencing problems, you will have to call your internet service provider.
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