How do I install windows live messenger?

In order to use Windows Live Messenger you need to have Windows Live account, if you don’t have one go to http://www.live.com/, click Sign in, then Sign up. Alternatively you can go to http://www.hotmail.com and create an account there.

Once done, download the Windows Live Messenger from here, double click the installation file and follow the installation wizard.

After that you can use the account you have created in the first step to sign in.