Problems installing iTunes on 64-bit Windows PC

I cannot install iTunes on a new PC running Windows 7 (64-bit). I get an error message that says "The folder path 'iTunes Music' contains an invalid character." I cannot locate a folder named "iTunes Music" on my PC. If I use the control panel, I see a program iTunes, but it will neither run, repair, nor install. I get the same error message when attempting all of those.
Any suggestions?

Thanks for your help.
I have run both utilities, but still cannot install. It does not appear as if all components were completely removed, as directories with content still for iTunes, Bonjour, Apple Software Updater, and Apple Application Support under Program Files, Program Files (x86), and Program Data. (I don't have any other Apple software installed on this machine.)
When I run the install software, the error message has changed. I now get a message "Could not open key: UNKNOWN\Components\DA42BC89BF25F5BD0AF18C3B9B1A1EE8\C8FDA2211ADDC08499638CF8825 22B56. Verify that you have sufficient access to that key or contact your support personnel."
I am running the install as administrator, so should have sufficient privileges. I tried your user tip https://discussions.apple.com/docs/DOC-3581 to see if it resolved the issue, but am still getting the same key access error messages.

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Perhaps let's first try updating your Apple Software Update.
Launch Apple Software Update ("Start > All Programs > Apple Software Update"). Does it launch and offer you a newer version of Apple Software Update? If so, choose to install just that update to Apple Software Update. (Deselect any other software offered at the same time.)
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Hi guys, I'm having some problems right now, as I am unable to use my iPhone with iTunes. I get the error message; "This iPhone cannot be used because the required software is not installed. Run the iTunes installer to remove iTunes, then install the 64-bit version of iTunes."
I have been able to sync my iPhone fine since i upgraded to Windows 8, this problem MAY have arisen after i last updated iTunes, but I cannot be sure as i haven't synced my phone in a little while.
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Let's try a standalone Apple Mobile Device Support install. It still might not install, but fingers crossed any error messages will give us a better idea of the underlying cause of why it's not installing under normal conditions.
Download and save a copy of the iTunesSetup.exe (or iTunes64setup.exe) installer file to your hard drive:
http://www.apple.com/itunes/download/
Download and install the free trial version of WinRAR:
http://www.rarlab.com/
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tt2

Problems installing iTunes on 64-bit Windows PC

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