When installing QuickTime for Windows or iTunes + QuickTime for Windows, the installation may halt with the following error message: Could not open key: HKEY_LOCAL_MACHINESoftwareClassesQuickTimePlayerLib.QuickTimePlayerAppCLSID. Verify that you have sufficient access to that key, or contact your support personnel.

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QuickTime or iTunes Installer "Could not open key" alert stops install on Windows

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