[quickfist]

try to reinstall or repair it!! if you get repair window instead of the install window you have to do this:
you need to use regedit and clean the registrythese are the string that need to be deleted
open regedit and delete the following
hkey local machine\software\ea games delete mohaa folder
hkey current user\software\ea games delete mohaa folder
hkey local machine\software\microsoft\windows \currentversion\uninstall\delete{0DEA94ED-915 A-4834 -A87E-388D012C8E02}
reboot than you'll be able to install