Trying to update to 10.2.2,continues to error out.

I am trying to update to iTunes 10.2.2, updates were for 1)Quicktime, 2)iTunes+Quicktime, 3)Safari 5 and 4)Mobile Me Control Panel.  When I tried to update, it stopped at the end of the Quicktime update and said error occurred while installing the updates.
I then tried to download manually (download only) and got the message "Quicktime has an invalid signature, the download has been removed".  I got this same message when it attempted iTunes+Quicktime; it did complete the download for Safari 5 and Mobile Me Control Panel.
I tried repairing Apple Software Update and Quicktime in my control panel but it did not help, I am still getting the same messages.
Any guidance or help would be apreciated!

-delete all those downloads.
-uninstall all instances of iTunes and QuickTime
-reboot your PC
-download the iTunes package from http://www.apple.com/itunes/download/ it'll contain QuickTime
-wait patiently for it to download and check for errors
-install the download
Good luck.

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