If the Wireless device isn't secured, Secure it. Set up a SSID and Security Key(password). If it is secured, change the Security Key(password), Use the Linksys Setup Manual found here:
http://support.linksys.com/en-us/support/routers/WRT120N Always Secure your Wireless. If unsecure your signal, at best, COULD be use by anyone to connect to the web using your resources and slowing down your activity. At worst, use your signal for nefarious purposes causing you a great deal of Pain and Heartache, and MAYBE the FBI knocking at your door.
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