Updating from 7.6 to 8.2 for new Nano; keep getting "key" errors

Got my daughter a Nano. Says we have to have 8.0 or better for it to work. We have 7.6. Tried installing thru Apple Update but it kept getting an error after the download saying "invalid signature" and removed the download. Saw a topic that said to download 8 directly from the web and install. Have done that but now get numerous "could not write value to key" errors and finally a "could not open key" error that rolled back the entire install. Any suggestions?

Are you installing from the admin account you originally used to install iTunes? If not switching to that might help.
But when you get problems with access to registry keys you can fix the registry permission problem with the following link:
http://blogs.msdn.com/astebner/archive/2006/09/04/739820.aspx
It looks a bit daunting, but many people have used it successfully. It does take a long time to run so be patient with it.
One point I notice it says you can get your user name fro documents & settings, mostly this is true, but not always. You can get it from the task manager or in control panel>>User accounts

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