HKEY_LOCAL_MACHINE\Software\Classes\QuicktimePlayerLib.QuickTimePlayerApp\C

I get this message:
Could not open key HKEYLOCALMACHINE\Software\Classes\QuicktimePlayerLib.QuickTimePlayerApp\CLSID. Verify that you have suffficient access to that key, or contact your support personel.
when trying to install new versions of Quicktime and itunes. Could it be because I used my email on more than one computer to download itunes 7?

This has to do with permissions in the registry. Take a look at the post by Primus Bodacious in this link
http://discussions.apple.com/thread.jspa?threadID=688433&tstart=30
Also these on permissions
http://support.microsoft.com/?kbid=308421
http://support.microsoft.com/kb/308419/

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