marco, most likely the problems is because you are screwing up the OS by circumventing how it operates, its looking for a hooked api (which messenger exposes) so when a program that may or may not, or one that launched, sees its installed, it tries to load it but since it appears broken (which it is) it attempts to repair it.
you can kill the ebook thing by removing the ebook.api but it'll remove ebook functionality from acrobat.
when i load developer studio for instance, it looks up the yahoo im dlls, even though they don't get used, its just the way that these programs hook into the system, lots of things depend on other things.
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