I've found that on my Windows 8 64-bit PC whenever I try to install a new version of iTunes it always gives me an error. The only way to upgrade to the latest version is to uninstall iTunes completely, reboot, then install the new version of iTunes. Has anyone else ran into this issue? Could it be because I'm running the 64-bit version of Windows? It's kind of annoying completely uninstalling iTunes just to upgrade to the new version but it's not a huge issue.