I originally had Windows live installed on my system, but for some reason it is now missing!

I have tried to uninstall it from my add/remove section, but it is missing, so I tried installing it again from the home page – using “wlsetup-custom.exe” to setup the program., however when it goes through the instillation it tells me I already have – Messenger, Mail, Photo Gallery, Writer, Family Safety, Microsoft Outlook & Microsoft Office live already installed!
The only Windows messenger I have is “Windows Messenger Ver:  4.6 (4.6.0071)” and when I use it tells me it is not compatible with this version.

How do I fix this problem?

I am operation Win Xp Sp3