Change the SSID of your router to something unique. Don’t use the default setting. Change it to FuryOfATimeLordNet or some such.

Once you’ve connected to your new SSID, then delete the old one with the defaults and you’ll never have the problem again.

disable your wireless LAN!
start>control panel>network and internet connection>network connection.
select your W-LAN adapter and click your right mouse, and select disable.