I found a couple of resources I think will help with the error message you are getting.
I recommend first reviewing the following article (the title refers to Bonjour service failing to start, but the steps are relevant to the error message you are getting as well):
If you are still not able to install iTunes after following those steps, I recommend reviewing this article next:
Thank you for using Apple Support Communities.
i had the same problem. i found a simple solution - whatever browser you're using - stop.
1) download safari (for windows)
2) go to itunes website and download itunes from there
(every other browser errors for one reason or another, and i have them all, when you download through safari, it doesnt error it seems)