How do i secure my Linksys WRT-120n router’s wifi, it’s open?

IN ORDER TO SECURE THE LINKSYS WRT 120N ROUTERS WIFI WHEN IT IS OPEN WE HAVE TO FOLLOW THE FOLLOWING STEP

FIRST OF ALL WE HAVE TO CONNECT  A EATHERNET CABEL FROM THE ROUTER TO THE COMPUTER

NOW WE HAVE TO OPEN A BROWSER AND AT THE VERY TOP OF THE BROWSER THERE IS A LONG ADDRESS BAR WE HAVE TO TYPE THERE  192.168.1.1 AND THAT HIT ENTER AND WE HAVE TO USE  admin   AS A USERNAME AND A PASSWORD

AFTER LOGIN ON THE PAGE CHOOSE SELECT WIRELESS  AND THEN CLICK BASIC WIRELESS SETTINGS FROM THE MENU BAR

THEN CLICK MANUAL AND THEN ENTER UNIQUE OF THE NETWORK INTO THE MAIN NETWORK (SSID) IN THE FIELD AND SAVE THE SETTINGS

CHOOSE WIRELESS SECURITY AND THEN CHANGE SECURITY MODE  to WPA2 PERSONAL

ENTER SECURITY KEY

NOW YOUR ROUTER IS SECURED

Firstly you have to connect the ethernet cable between your router and your computer/ laptop.

Now go to any browser and enter "http://192.168.1.1" it will take you to the router login page , the default password and the username are admin.

Select "Wireless," and then click "Basic Wireless Settings" from the menu bar.

Click "Manual." Enter a unique name for the network into the Network Name (SSID) field, and then click "Save Settings."

Choose "Wireless Security"and then change Security Mode to "WPA2 Personal."

Enter a security key, Click Save Settings.

now your router is secured