Help how to add a contact we can't talk to a friend

we can’t talk to a friend on windows live messenger tell us how to fix this problem

Can you describe the problem in more detail? Any error messages you might be getting?

Getting to the Add a contact screen is different on every version, but in a lot of the major versions you can open up the main Messenger window, press the ALT key to bring up the menu, choose the Contacts menu and then the Add a contact... choice. Alternatively, look in the toolbar in the main Messenger window for the button with a Messenger icon with a + sign.