Sorry, you posted to a 4 year-old thread that was about the old version of the software and I was hoping to branch all posts at once but they got split up, I apologize. Yes I think there are momentary glitches with the download servers.
I find it best to download the installer to my desktop first then proceed from there.
Make sure that Vista is totally up to date - i.e. SP2 and that it has IE9 installed rather than IE8, whether or not you use IE is irrelevant, McAfee relies on it in the background in order to function properly.
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