Hello,my windows is windowsxp and I want to make to my modem/router a password.I've been told that if I do so then my internet will never open with me again.I would like to know is this true?and if not,I would like to know how could I make password so nobody can use my internet? plzzzzzzz help me because last time my gagas finished fast before the end of the month.waiting for your response and thanks in advance

It is not true, if you give it a password, you WILL be able to open again. Avoid wireless to keep hackers out, Use WPA if you have too.

So,how can I make a password??

You will need to access your Routers Menu, Example is for Linksys, enter 192.168.1.1 and enter the routers default user name and password and click on wireless or security, wherever it lets you set SSID, user name, password, WPA, WEP or whatever.
What do you have?

My router is billion,and when I open the page 192.168.1.254 I don't know what to do then and I feel afraid to make a change that will stop my modem from working and that's why I am here asking ,please help me fast..

Hello,I've just opened the page and I click on interface and then I clicked on internet,I found a place where there is written a username and password and under them written Encapsulation, so what shall I do? if I changed that username and password am I ganna be able to access into the internet ?and why people can access to my router and I have that password and user name?

Change the Router name and password if going wireless, or internal security may be a problem. You only need the user name and password if changing or viewing Router Information. Won't stop you from using it.
Then there is a place for security where you can select WEP, WPA etc. also change your SSID. With the security, it should help keep out hackers.
DO REMEMBER ANY PASSWORDS OR SECURITY KEYS.