Plug ethernet cable directly between a pc and router and then type in dos prompt ipconfig to find ip address of default gateway if this is the only router. Then note ip addressd it will be most likely 192.168.0.1 or 10.0.0.1 and put this into an internet brower url address box and you should be able to log into the router unless it has a password and user name set . Go may need to google the default user name and password for the router . go into wireless security settings and then you should be able to change the encryption key.
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Plug ethernet cable directly between a pc and router and then type in dos prompt ipconfig to find ip address of default gateway if this is the only router. Then note ip addressd it will be most likely 192.168.0.1 or 10.0.0.1 and put this into an internet brower url address box and you should be able to log into the router unless it has a password and user name set . Go may need to google the default user name and password for the router . go into wireless security settings and then you should be able to change the encryption key.