I have noticed that when using my wireless internet connection other networks have passwords connected to them.

I just want to make my network secure with the rest of em. How would I go about attaching a password to my Network?

The system is Windows XP.

You should of been given a means when you first setup the wireless router and it took you through the wizard, it might be worth uninstalling it and reinstalling it again and adding a password that way

Well, I believe my mom set it up. We also had a lot fo trouble setting it up in the first place, so I don't think she would go for doing it all over again. Shouldn't there just be a window that I can open that has the option of just adding a password to the network?