Signature Error when trying to update to iTunes 10.2.2

I am trying to update my iTunes to the newest version so I can sync up my iPhone but it gets about 3/4 of the way through the upload it says - "iTunes + Quicktime" has an invaild signature. It will not be installed. -
I have uninstalled iTunes and now I can't get it back!
Does any one know how to fix this?
Cheers Christine

Ahh ok good to hear GLad I could help

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Sep 18 14:14:10 kpl-kdileepan.kumc.edu Software Update[4014]: Product zzzz041-9488: no package found for identifier com.apple.pkg.iTunesX.11.1.0.delta
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I'm in the same boat.
Tried uploading to iOS7 on my laptop. It looked like it was working, but then said I needed to restore my phone. I did. Now I have a phone that won't turn on, won't "activate".
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Ahh ok good to hear GLad I could help

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Steve, glad that you solved it yourself, but it might be worth taking on board that the steps you mention have not been sufficient for many people which is why Apple and others like myself have been offering somewhat deeper advice. Perhaps reiterating what has often already been suggested in such threads is not really necessary.
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