ITunes suddenly refuses to open

I'm looking for some help with my iTunes. I have windows 7 and have been running iTunes on it for months now. Just today I attempted to open iTunes and a few messages came up saying that I'm missing CoreVideo.dll, CoreAudioToolbox.dll, that there are problems with QuickTime, and that I need access to some key thing. I've tried uninstalling and reinstalling but I keep getting error messages about some key. I'm boiling in frustration and just want my iTunes to work again. If anyone can offer some help I'd greatly appreciate it.

Dunno about AppZapper.
Does it delete the old Preferences (plist) file?
If you reinstall an app on a Mac to try to fix it, if the Prefs are wonky and you don't delete them too, nothing will improve...
Many times all you need to do is delete the Prefs file (the app will automagically create a new one] and the problem is fixed!

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