No, allow me to go on. Why in the world does an "update" to iTunes require an 85 MB download? Why does Quicktime try to force it's way to being the default player for all media types after every iTunes update?
Simple... the download contains both Windows XP and Windows Vista versions... and one installer will install both as needed. Microsoft provides different installers depending on the Windows version you have.
Why does Quicktime try to force it's way to being the default player for all media types after every iTunes update?
Also simple... every media manager asks if you want it to be the default handler for your media files after installation. "...force it's way..."? I'd say that's a bit strong: iTunes asks you if you want to use iTunes as your media file handler; all you have to do is click NO. That is hardly "forcing its way into being your default handler.
By-the-way, what sites does iTunes force you to?
You asked — Why in the world does an “update” to iTunes require an 85 MB download?
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People have a lot of variations on their computers and to install the software properly on all varieties, it will download an installer capable of installing things properly. However, once that is done, you’re done with that and your software will not be increasing in size by 85 MB... :-)
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You also asked — Why does Quicktime try to force it’s way to being the default player for all media types after every iTunes update?
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iTunes and Quicktime work together. There is functionality on iTunes that is derived from Quicktime, as it’s a “package” for all sorts of codecs. It’s actually the best media software you’re going to get out there in computer land... :-)
But, if you didn’t want to use Quicktime, you wouldn’t have to use it, and you wouldn’t get the functionality that some of iTunes uses Quicktime for. You should consider iTunes and Quicktime and complementary to each other and part of a complete whole for media.