ITunes Installation Error Message?

I recently had to install an update for iTunes. After the update was installed, I was promted by an error message that "iTunes was not installed correctly", and that I needed to reinstall iTunes. Once I completed the process of uninstalling iTunes, I began to reinstall iTunes. After the reinstallation process, I was then prompted by another error message that had said, "iTunes was not installed correctly. Please reinstall iTunes. Error 7 (Windows error 126)." I have continued to receive this error prompt every time that I have attempted to reinstall iTunes. I have even followed troublshooting procedures on this Apple Support page: http://support.apple.com/kb/HT1926  and still have not had any luck. Is there anyone that can help me with this please?

Hello there, John.
The following Knowledge Base article addresses the very issue you're describing:
iTunes 11.1.4 for Windows: Unable to install or open
http://support.apple.com/kb/TS5376
Check for .dll files
Go to C:\Program Files (x86)\iTunes and C:\Program Files\iTunes and look for .dll files.
If you find QTMovie.DLL, or any other .dll files, move them to the desktop.
Reboot your computer.
Note: Depending on your operating system, you may only have one of the listed paths.
Uninstall and reinstall iTunes
Uninstall iTunes and all of its related components.
Reboot your computer. If you can't uninstall a piece of Apple software, try using the Microsoft Program Install and Uninstall Utility.
Re-download and reinstall iTunes 11.1.4.
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

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