Is there any way to secure one's Yahoo ID so that no one finds the IP address? if so, then how?

From experience I've learned that IP addresses cannot be detected through a yahoo id. Your IP adress will always change everytime you log on the internet from the last time you were logged on. As for the yahoo id, don't give out information you don't want people to know. Sign in to your mail in yahoo and go to 'My Account in the upper half of the page and there you can choose to change all the information you don't want people on the internet to see. Except for your zip code but I don't think that Yahoo will give a person's zip code out to too many people. As my teacher always tells us, let your antivirus software update itself everyday. Beware of zero day attacks by limiting the amount of email attachments that you click on. And relax, social engineering is most people's biggest threat. Google: 'Computer Threats' and read up a little about it, you'll regret it if you don't.