iTunes install error (reg key)

Trying to install iTunes and Quicktime v7.1.15 on Win XP... after running the installer and "writing registry values", I receive the following error:
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Could not open key:
HKEY_LOCAL_MACHINE\Software\Classes\QuickTimePlayerLib.QuickTimePlayerApp\CLSID. Verify that you have sufficient access to that key, or contacr your support personnel.
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Note, I'm logged in as an administrator when attempting to install iTunes.
t15robertsAsked:
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MereteCommented:

Hi t15roberts
this is from QTime database

QuickTime or iTunes Installer "Could not open key" alert stops install on Windows
Issue or symptom
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_MACHINE\Software\Classes\QuickTimePlayerLib.QuickTimePlayerApp\CLSID. Verify that you have sufficient access to that key, or contact your support personnel.
Products affected
QuickTime 7.1.3
iTunes 7.0, 7.0.1
Windows
Solution
Install iTunes 7.0.2 while logged into a user account with administrator privileges. Note: If you are seeing this message when using the QuickTime standalone installer, it is recommended that you use the iTunes 7.0.2 installer (which includes the latest version of QuickTime) to resolve this issue.
If the issue persists with iTunes 7.0.2, it is possible you are installing iTunes with a administrator user account different than the one used in the past when installing iTunes or QuickTime. If this is the case and you still have the original administrator user account on the computer, try installing iTunes 7.0.2 from this original administrator user account.
If the issue persists beyond these two steps, there is an issue with one or more keys the QuickTime installer needs to access in the registry. Resolving this issue will require either reinstalling Windows, using a third-party registry utility, or manually editing the registry.

 
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