I am running WINDOWS XP. After a hardware breakdown, the technician re-installed a number of programs I had lost. I now find that I have WINDOWS MESSENGER, which looks totally different and does not have the same facilities as the Messenger Program I had before. I assume that I need to install WINDOWS LIVE MESSENGER. I need advice whether to uninstall Windows Messenger before downloading and installing Windows Live Messenger, and the best way to go about it.  Thank you for your help.