My messenger doesnt exist on my computer ??

Hello,

i installed this imotion programs that messed up my messenger, so i deleted all the files of msn, and i uninstalled it, now when i want to download msn again, i start downloading then another window opens says niether we wanted to choose costum programs to download or all the essintails, so when i choose costum, the window show's that windows live messenger already exists on my pc, and again i tried to install everything but still... i search every single where on my pc, the local desk, the program files, i wrote : windows - messenger - live such stuff on the search bar in the menu, but no messenger icon appeared, i tried to download msn again and again many times, but still show the same thing,
guys please help me i really need an answer please please please thank u