On Windows 7 or 8, download iTunes directly from Apple. Follow the onscreen instructions to install and configure iTunes.
As a new OS, there will be issues in the first set of months after launch, and the inability of some folks to install iTunes is one of them. Whether or not this is an Apple or Microsoft issue ...
First, you'll need to install all three apps; you can't just pick and choose. If you download only one of them, iTunes for ...